Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
ASSETS
Cash and cash equivalents	$ 46,281	$ 42,492
Accounts receivable, net	42,180	43,328
Inventories	9,452	11,342
Prepaid expenses and other assets	7,660	11,126
Total current assets	105,573	108,288
Property and equipment, net	9,112	8,764
Intangible assets	3,332	2,680
Other assets	288	500
Total assets	118,305	120,232
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable	30,829	37,421
Accrued compensation	3,260	4,015
Accrued expenses	9,594	8,039
Deferred revenue	4,692	5,319
Total current liabilities	48,375	54,794
Other long-term liabilities	2,484	2,908
Total liabilities	50,859	57,702
Commitments and Contingencies (Note 8)
Stockholders' Equity:
Preferred stock, $0.001 par value, 10,000 shares authorized, no shares issued or outstanding at December 31, 2014 and March 31, 2015	0	0
Common stock, $0.001 par value, 100,000 shares authorized, 60,777 and 61,121 shares issued and outstanding at December 31, 2014 and March 31, 2015, respectively	61	61
Additional paid-in capital	337,879	336,827
Accumulated other comprehensive loss	(3,159)	(3,152)
Accumulated deficit	(267,335)	(271,206)
Total stockholders' equity	67,446	62,530
Total liabilities and stockholders' equity	$ 118,305	$ 120,232