Condensed Consolidated Statement of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Operating activities
Net loss	$ (273)	$ (1,147)
Adjustments to reconcile net loss to cash provided by (used in) operating activities:
Depreciation expense	262	252
Charge to allowance for doubtful accounts	(42)	(75)
Loss on disposal of fixed assets		(29)
Impairment on fixed assets	(17)	0
Stock-based compensation	137	364
Changes in operating assets and liabilities:
Restricted cash	(129)	(1,011)
Accounts receivable	344	(4,371)
Inventories	1,649	1,051
Prepaid expenses and other assets	(425)	(502)
Accounts payable	872	1,382
Accrued expenses	(23)	(1,167)
Deferred revenue	(728)	3,327
Long term liabilities	61	22
Net cash provided by (used in) operating activities	1,688	(1,904)
Investing activities
Purchases of property and equipment	(231)	(495)
Proceeds from sale of fixed assets	17	0
Net cash used in investing activities	(214)	(495)
Financing activities
Proceeds from private placement of common stock	0	9,750
Issuance costs of private placement	0	(122)
Proceeds from draw on revolving line of credit	0	2,017
Payments on revolving line of credit	0	(2,017)
Proceeds from employee stock purchases	388	420
Taxes paid related to net share settlement of equity awards	(36)	0
Net cash provided by financing activities	352	10,048
Translation gain (loss) on subsidiaries in foreign currencies	(301)	36
Change in cash and cash equivalents	1,525	7,685
Cash and cash equivalents, beginning of period	13,524	10,357
Cash and cash equivalents, end of period	$ 15,049	$ 18,042