Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash flows from operating activities:
Net loss	$ (4,287,000)	$ (8,982,000)
Adjustments to reconcile net loss to cash used in operating activities:
Bad debt expense	48,000	347,000
Stock-based compensation expense	1,499,000	1,233,000
Depreciation and amortization	522,000	557,000
Inventory reserve	160,000	186,000
Other non-cash items	21,000	27,000
Changes in:
Accounts receivable	1,996,000	1,604,000
Financing receivables	435,000	932,000
Inventory	930,000	(1,137,000)
Prepaid expenses and other assets	(93,000)	(478,000)
Deferred costs	(2,438,000)	(903,000)
Deferred revenue	1,669,000	(410,000)
Accounts payable and accrued expenses	(1,744,000)	(523,000)
Net cash used in operating activities	(1,282,000)	(7,547,000)
Cash flows from investing activities:
Expenditures for fixed assets including website development costs	(389,000)	(1,871,000)
Purchase of investments	(768,000)	(2,524,000)
Proceeds from the sale and maturities of investments	758,000	8,258,000
Net cash provided by (used in) investing activities	(399,000)	3,863,000
Cash flows from financing activities:
Borrowings under revolving credit facility	1,900,000
Repayments under revolving credit facility	(1,314,000)
Principal payments of capital lease obligation		(121,000)
Proceeds from exercise of stock options	20,000	1,965,000
Net cash provided by financing activities	606,000	1,844,000
Effect of foreign exchange rate changes on cash and cash equivalents	183,000	182,000
Net decrease in cash and cash equivalents	(892,000)	(1,658,000)
Cash and cash equivalents - beginning of period	4,489,000	5,974,000
Cash and cash equivalents - end of period	3,597,000	4,316,000
Cash paid for:
Taxes
Interest	134,000	11,000
Noncash activities:
Unrealized gain on investments	8,000	24,000
Shares withheld pursuant to stock issuance	$ 293,000	$ 455,000