CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Receivables allowance (in dollars)	$ 2,579	$ 204
Redeemable preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, authorized shares	35,000,000	35,000,000
Common stock, issued shares	887,414	938,859
Common stock, outstanding shares	887,414	882,954
Series A preferred stock
Redeemable preferred stock, authorized shares	1,170,000	1,170,000
Redeemable preferred stock, issued shares	1,170,000	1,170,000
Redeemable preferred stock, outstanding shares	1,170,000	1,170,000
Redeemable preferred stock, liquidation preference (in dollars)	$ 5,850	$ 5,850
Series B preferred stock
Redeemable preferred stock, authorized shares	4,000,000	4,000,000
Redeemable preferred stock, issued shares	3,113,099	3,113,099
Redeemable preferred stock, outstanding shares	3,113,099	3,113,099
Redeemable preferred stock, liquidation preference (in dollars)	$ 15,565	$ 15,565
Series B-1 preferred stock
Redeemable preferred stock, authorized shares	8,830,000	8,830,000
Redeemable preferred stock, issued shares	5,461,802	5,461,802
Redeemable preferred stock, outstanding shares	5,461,802	5,461,802
Redeemable preferred stock, liquidation preference (in dollars)	$ 62,731	$ 61,647
Series C preferred stock
Redeemable preferred stock, authorized shares	13,500,000	13,500,000
Redeemable preferred stock, issued shares	11,528,483	8,753,547
Redeemable preferred stock, outstanding shares	11,528,483	8,753,547
Redeemable preferred stock, liquidation preference (in dollars)	$ 57,642	$ 43,768