Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Statement of Cash Flows [Abstract]
Net income (loss)	$ 5,064	$ (14,950)	$ (22,024)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	3,125	3,527	4,755
Provision of bad debt expense	2	25	203
Stock-based compensation expense	2,690	3,723	5,385
Issuance of warrant to customer	0	0	1,007
Long-lived assets impairment charge	0	1,647	2,928
Goodwill impairment charge	0	0	4,140
Loss on write-off of fixed assets	23	244	0
Changes in operating assets and liabilities, net of effects of business acquisition:
Accounts receivable	(17,931)	6,621	3,309
Inventories	(1,503)	213	2,091
Prepaid expenses and other assets	(1,618)	1,740	(4,263)
Accounts payable	11,100	(7,474)	(92)
Accrued compensation and other expenses	614	(2,505)	5,833
Deferred revenue	1,340	2,017	(501)
Other long-term liabilities	1,182	2,726	(571)
Net cash provided by (used in) operating activities	4,088	(2,446)	2,200
Cash Flows From Investing Activities:
Purchases of property and equipment	(3,644)	(6,152)	(2,548)
Proceeds from sale of property and equipment	0	74	0
Net cash used in investing activities	(3,644)	(6,078)	(2,548)
Cash Flows From Financing Activities:
Principal payment of note payable	0	(71)	(398)
Payments on bank borrowings	(7,700)	(1,800)	0
Proceeds from bank borrowings	6,900	4,600	0
Shares withheld for tax purposes	(223)	(590)	(422)
Proceeds from sale of stock to employees	1,062	756	1,450
Net cash provided by financing activities	39	2,895	630
Effect of Exchange Rate Changes on Cash and Cash Equivalents	(392)	(224)	154
Net Increase (Decrease) in Cash and Cash Equivalents	91	(5,853)	436
Cash and Cash Equivalents, beginning of period	40,315	46,168	45,732
Cash and Cash Equivalents, end of period	40,406	40,315	46,168
Supplemental Disclosures of Non-Cash Investing and Financing Activities:
Property and equipment acquired but not yet paid	398	477	1,540
Stock payment for employee bonus plan	0	1,005	0
Supplemental Cash Flow Data:
Cash paid for income taxes	$ 72	$ 116	$ 235