Condensed Consolidated Statements Of Changes In Stockholders'/ Members' Equity And Comprehensive Income (USD $) In Thousands	Common Shares [Member]	Common Stock [Member]	Treasury Shares/Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income [Member]	Total
Balances at Dec. 31, 2010	$ 34,161		$ (441)			$ 164	$ 33,884
Balances, shares at Dec. 31, 2010	57,627		(121)
Issuance of common stock in connection with initial public offering, net of issuance costs of $10,209		1		87,701			87,702
Issuance of common stock in connection with initial public offering, net of issuance costs of $10,209, shares		9,791
Issuance of common stock from exercise of stock options	476			1,871			2,347
Issuance of common stock from exercise of stock options, shares	133	439
Stock-based compensation	2,241			2,895			5,136
Comprehensive income:
Net income	(4,305)				20,588		16,283
Foreign currency translation adjustments						628	628
Unrealized loss on investment						(7)	(7)
Total comprehensive income							16,904
Conversion to corporation	(32,573)	6		40,005			7,438
Conversion to corporation, shares	(57,760)	57,760
Balances at Jun. 30, 2011		$ 7	$ (441)	$ 132,472	$ 20,588	$ 785	$ 153,411
Balances, shares at Jun. 30, 2011		67,990	(121)