Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

CONSOLIDATED BALANCE SHEETS (Parenthetical)

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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Accounts receivable, allowance for doubtful accounts $ 4,759 $ 4,180
Property and equipment, accumulated depreciation $ 26,534 $ 19,822
Common stock, par value $ 0.001 $ 0.001
Common stock, shares authorized 250,000,000 100,000,000
Common stock, shares issued 75,820,307 60,242,818
Common stock, shares outstanding 75,820,307 60,242,818
Series A Redeemable Convertible Preferred Stock [Member]    
Redeemable Convertible Preferred Stock, par value $ 0.01 $ 0.01
Redeemable Convertible Preferred Stock, shares authorized 50,000,000 10,000,000
Redeemable Convertible Preferred Stock, shares issued 14,666,667 0
Redeemable Convertible Preferred Stock, shares outstanding 14,666,667 0