Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
ASSETS
Cash and cash equivalents	$ 40,402	$ 40,315
Accounts receivable, net	29,072	25,025
Inventories	4,193	5,037
Prepaid expenses and other assets	6,047	5,810
Total current assets	79,714	76,187
Property and equipment, net	7,842	7,147
Other assets	559	603
Total assets	88,115	83,937
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable	24,528	22,659
Accrued compensation	5,163	4,863
Accrued expenses	7,312	8,690
Deferred revenue	3,970	2,889
Credit facility borrowings	2,100	2,800
Total current liabilities	43,073	41,901
Other long-term liabilities	3,397	3,261
Total liabilities	46,470	45,162
Commitments and Contingencies (Note 9)
Stockholders' Equity:
Preferred stock, $.001 par value, 10,000 shares authorized, zero shares issued and outstanding at December 31, 2012 and June 30, 2013	0	0
Common stock, $.001 par value, 100,000 shares authorized, 58,265 and 58,613 shares issued and outstanding at December 31, 2012 and June 30, 2013, respectively	58	58
Additional paid-in capital	328,145	326,575
Accumulated other comprehensive loss	(3,329)	(3,533)
Accumulated deficit	(283,229)	(284,325)
Total stockholders' equity	41,645	38,775
Total liabilities and stockholders' equity	$ 88,115	$ 83,937