Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
ASSETS
Cash and cash equivalents	$ 40,357	$ 40,315
Accounts receivable, net	30,110	25,025
Inventories	6,426	5,037
Prepaid expenses and other assets	6,816	5,810
Total current assets	83,709	76,187
Property and equipment, net	7,792	7,147
Other assets	533	603
Total assets	92,034	83,937
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable	27,159	22,659
Accrued compensation	5,256	4,863
Accrued expenses	7,677	8,690
Deferred revenue	4,216	2,889
Credit facility borrowings	0	2,800
Total current liabilities	44,308	41,901
Other long-term liabilities	3,382	3,261
Total liabilities	47,690	45,162
Commitments and Contingencies (Note 9)
Stockholders' Equity:
Preferred stock, $.001 par value, 10,000 shares authorized, no shares issued or outstanding at December 31, 2012 and September 30, 2013	0	0
Common stock, $.001 par value, 100,000 shares authorized, 58,265 and 58,978 shares issued and outstanding at December 31, 2012 and September 30, 2013, respectively	59	58
Additional paid-in capital	329,076	326,575
Accumulated other comprehensive loss	(3,318)	(3,533)
Accumulated deficit	(281,473)	(284,325)
Total stockholders' equity	44,344	38,775
Total liabilities and stockholders' equity	$ 92,034	$ 83,937