Statements Of Cash Flows (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Operating Activities:
Net income (loss)	$ 420,000	$ (1,577,000)
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Depreciation and amortization	274,000	283,000
Stock-based compensation	77,000	185,000
Gain on sale of property and equipment	(12,000)
Changes in operating assets and liabilities:
Accounts receivable	(2,338,000)	665,000
Inventories	(15,000)	(38,000)
Income tax receivable	(28,000)
Prepaid expenses and other	92,000	(570,000)
Accounts payable	496,000	(242,000)
Accrued liabilities	(770,000)	(927,000)
Income tax payable	563,000	(748,000)
Deferred revenue	347,000	164,000
Net cash used in operating activities	(894,000)	(2,805,000)
Investing Activities:
Purchases of property and equipment	(16,000)	(40,000)
Proceeds received from sale of property and equipment	13,000
Net cash used in investing activities	(3,000)	(40,000)
Financing Activities:
Proceeds from issuance of common stock	87,000	131,000
Repurchase of common stock, net		(213,000)
Net cash provided by (used in) financing activities	87,000	(82,000)
Decrease in cash and cash equivalents	(810,000)	(2,927,000)
Cash and cash equivalents at beginning of period	20,271,000	23,202,000
Cash and cash equivalents at end of period	19,461,000	20,275,000
Supplemental disclosures for cash flow information:
Cash paid during the year for income taxes	$ 30,000	$ 790,000