STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Operating Activities:
Net income (loss)	$ 1,399,000	$ (639,000)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	1,167,000	1,348,000
Changes in allowance for doubtful accounts	(191,000)	72,000
Deferred income tax expense	259,000	40,000
Stock-based compensation	410,000	387,000
Gain on sale of property and equipment	(35,000)	0
Changes in operating assets and liabilities:
Accounts receivable	3,292,000	(2,057,000)
Inventories	(52,000)	24,000
Income tax receivable	233,000	415,000
Prepaid expenses and other	109,000	274,000
Accounts payable	95,000	697,000
Accrued liabilities and deferred rent	463,000	882,000
Accrued income taxes	32,000	27,000
Deferred revenue	(70,000)	310,000
Net cash provided by operating activities	7,111,000	1,780,000
Investing Activities:
Purchases of property and equipment	(1,337,000)	(1,159,000)
Proceeds from sale of property and equipment	35,000	0
Net cash used in investing activities	(1,302,000)	(1,159,000)
Financing Activities:
Cash dividends paid ($0.70 per share)	(14,000)	(8,177,000)
Proceeds from issuance of common stock, net	49,000	0
Repurchase of common stock upon vesting of restricted stock awards and vesting of restricted stock units	(81,000)	(16,000)
Repurchase of common stock, net	(298,000)	0
Net cash used in financing activities	(344,000)	(8,193,000)
Increase (decrease) in cash and cash equivalents	5,465,000	(7,572,000)
Cash and cash equivalents at beginning of year	4,695,000	12,267,000
Cash and cash equivalents at end of year	10,160,000	4,695,000
Supplemental disclosures for cash flow information:
Cash refunded during the year for income taxes	(39,000)	(743,000)
Non-cash investing and financing activities:
Cash dividends declared included in accounts payable	42,000	56,000
Purchases of property and equipment included in accounts payable and accrued liabilities	$ 60,000	$ 39,000