Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

Stock Options, Stock Purchase Plan and Warrants - Additional Information (Detail)

v3.3.1.900
Stock Options, Stock Purchase Plan and Warrants - Additional Information (Detail) - USD ($)
12 Months Ended
Mar. 16, 2014
Mar. 12, 2014
Feb. 07, 2014
Jan. 09, 2012
Jan. 01, 2007
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Dec. 30, 2015
May. 03, 2010
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                      
Amended Plan expiration date           Oct. 15, 2025          
Common stock reserved and available for issuance under the Amended Plan           12,500,000          
Stock option outstanding           5,326,505 4,012,096 5,725,298 5,777,212    
Stock option to purchase           1,819,000 760,500 416,000      
Shares were available for future option and stock awards under the Amended Plan           4,081,940          
Aggregate intrinsic value of all stock options outstanding and expected to vest           $ 25,500,000          
Aggregate intrinsic value of currently exercisable stock options           $ 16,000,000          
Common stock closing price           $ 7.87          
Total number of in the money options outstanding and exercisable                   2,600,000  
Total intrinsic value of options exercised           $ 2,470,000 $ 8,882,000 $ 1,200,000      
Total cash proceeds received from the exercise of stock options           714,000 1,807,000 372,000      
Total fair value of options granted           3,347,000 1,139,000 493,000      
Total fair value of option shares vested           871,000 $ 540,000 $ 349,000      
Unrecognized stock-based compensation cost           $ 4,861,000          
Unrecognized cost is expected to be recognized over a weighted-average period           1 year 4 months 24 days          
Shares issued under ESPP           73,958 90,285 76,595      
Albitar warrant period                 5 years    
Number of remaining warrants un-vested           120,000          
Proceeds from stock options exercised     $ 62,500                
Common stock warrants issued to the Consultant (Steven Jones)                     450,000
Class of Warrant or Right, Exercise Price of Warrants or Rights           $ 1.48         $ 1.50
Albitar Warrants [Member]                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                      
Stock compensation expense           $ 422,000 $ 49,000 $ 231,000      
Options expiry period       Jan. 09, 2017              
Albitar Warrants [Member] | Vesting at Commercial Launch [Member] | Plasma Prostate Cancer Test Licensed From Health Discovery Corp HDC [Member]                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                      
Warrants granted       80,000              
Albitar Warrants [Member] | Vesting at Commercial Launch [Member] | Colon Cancer Test Licensed From HDC [Member]                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                      
Warrants granted       40,000              
Albitar Warrants [Member] | Vesting at Commercial Launch [Member] | Pancreatic Cancer Test Licensed From HDC [Member]                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                      
Warrants granted       40,000              
Albitar Warrants [Member] | Vesting at Successful Consummation Of Sublicensing Agreement[Member] | Cytogenetics Automated Image Analysis Technology Licenses From HDC [Member]                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                      
Warrants granted       20,000              
Albitar Warrants [Member] | Vesting at Successful Consummation Of Sublicensing Agreement[Member] | Cytometry Automated Image Analysis Technology Licenses From HDC [Member]                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                      
Warrants granted       20,000              
Warrant [Member]                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                      
Stock compensation expense           $ 0 $ 51,000 $ 263,000      
Warrants granted       200,000   0 0 0      
Weighted average exercise price, granted       $ 1.43   $ 0 $ 0 $ 0      
Deemed value per share       $ 4.00              
Value of Albitar Warrants           $ 920,000          
Number of remaining warrants un-vested           120,000 120,000        
Warrants exercised   375,000 83,333     0 458,333 0      
Exercise price of warrants   $ 1.05 $ 0.75                
Proceeds from stock options exercised   $ 393,750                  
Warrants issued and expired 250,000         0 250,000 0      
Employee Stock Purchase Plan [Member]                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                      
Limited payroll deductions a discount         5.00%            
Stock Options [Member]                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                      
Stock compensation expense           $ 2,889,000 $ 511,000 $ 666,000      
Minimum [Member]                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                      
Options expiry period           5 years          
Stock option term           3 years          
Maximum [Member]                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                      
Options expiry period           10 years          
Stock option term           4 years          
Chief Executive Officer [Member]                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                      
Stock option to purchase           800,000