CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock	Paid-in Capital	Accumulated Other Comprehensive Loss	Accumulated Deficit	Total
Balance at Dec. 31, 2012	$ 25	$ 256,448		$ (186,475)	$ 69,998
Balance (in shares) at Dec. 31, 2012	25,189,340
Increase (Decrease) in Shareholders' Equity
Exercise of stock options and purchase of shares related to the employee stock purchase plan	$ 1	846			847
Exercise of stock options and purchase of shares related to the employee stock purchase plan (in shares)	348,681
Stock based compensation		3,303			3,303
Stock based compensation (in shares)	274,733
Net income (loss)				(7,319)	(7,319)
Balance at Dec. 31, 2013	$ 26	260,597		(193,794)	66,829
Balance (in shares) at Dec. 31, 2013	25,812,754
Increase (Decrease) in Shareholders' Equity
Exercise of stock options and purchase of shares related to the employee stock purchase plan	$ 1	1,050			1,051
Exercise of stock options and purchase of shares related to the employee stock purchase plan (in shares)	503,036
Stock based compensation		4,037			4,037
Stock based compensation (in shares)	195,437
Issuance of stock related to prior year business combinations		1,552			1,552
Issuance of stock related to prior year business combinations (in shares)	182,021
Net income (loss)				(9,793)	(9,793)
Balance at Dec. 31, 2014	$ 27	267,236		(203,587)	63,676
Balance (in shares) at Dec. 31, 2014	26,693,248
Increase (Decrease) in Shareholders' Equity
Exercise of stock options and purchase of shares related to the employee stock purchase plan		1,222			1,222
Exercise of stock options and purchase of shares related to the employee stock purchase plan (in shares)	268,448
Stock based compensation		4,952			4,952
Stock based compensation (in shares)	451,116
RSUs withheld to cover taxes		(1,575)			(1,575)
RSUs withheld to cover taxes ( in shares )	(167,090)
Issuance of stock related to prior year business combinations		235			235
Issuance of stock related to prior year business combinations (in shares)	32,217
Currency translation adjustment			$ (12)		(12)
Net income (loss)				7,428	7,428
Balance at Dec. 31, 2015	$ 27	$ 272,070	$ (12)	$ (196,159)	$ 75,926
Balance (in shares) at Dec. 31, 2015	27,277,939