Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Net of allowance for doubtful accounts	$ 652	$ 276
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	10,000,000	0
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	100,000,000	35,700,000
Common stock, shares issued	39,393,903	12,563,095
Common stock, shares outstanding	39,393,903	12,563,095
Treasury Stock, shares	401,626	401,626
Series A Redeemable Convertible Preferred Stock [Member]
Redeemable convertible preferred stock, par value	$ 0.01	$ 0.01
Redeemable convertible preferred stock, authorized	0	6,303,033
Redeemable convertible preferred stock, issued	0	6,303,033
Redeemable convertible preferred stock, outstanding	0	6,303,033
Redeemable convertible preferred stock, liquidation value	$ 0	$ 9,252
Series B Redeemable Convertible Preferred Stock [Member]
Redeemable convertible preferred stock, par value	$ 0.01	$ 0.01
Redeemable convertible preferred stock, authorized	0	519,269
Redeemable convertible preferred stock, issued	0	519,269
Redeemable convertible preferred stock, outstanding	0	519,269
Redeemable convertible preferred stock, liquidation value	$ 0	$ 880
Series C Redeemable Convertible Preferred Stock [Member]
Redeemable convertible preferred stock, par value	$ 0.01	$ 0.01
Redeemable convertible preferred stock, authorized	0	6,873,797
Redeemable convertible preferred stock, issued	0	6,873,797
Redeemable convertible preferred stock, outstanding	0	6,873,797
Redeemable convertible preferred stock, liquidation value	$ 0	$ 59,829
Series D Redeemable Convertible Preferred Stock [Member]
Redeemable convertible preferred stock, par value	$ 0.01	$ 0.01
Redeemable convertible preferred stock, authorized	0	2,696,504
Redeemable convertible preferred stock, issued	0	2,686,516
Redeemable convertible preferred stock, outstanding	0	2,686,516
Redeemable convertible preferred stock, liquidation value	$ 0	$ 31,143