Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Operating Activities:
Net income (loss)	$ (6,518)	$ 4,465
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	231	184
Noncash lease costs	294	232
Stock-based compensation	322	47
Loss on abandoned real estate operating lease	1,092	0
Penalties and waived penalties on dividends	0	6
Changes in operating assets and liabilities:
Accounts receivable	333	401
Prepaid expenses and other assets	(258)	(61)
Accounts payable and accrued expenses	(334)	(496)
Deferred revenue	(339)	(488)
Net cash provided by (used in) operating activities	(5,177)	4,290
Investing Activities:
Purchases of property and equipment	(320)	(260)
Net cash used for investing activities	(320)	(260)
Financing Activities:
Payments on loan from officer	0	(1,815)
Proceeds from PPP loan payable	629	0
Payments of dividends	(99)	(714)
Principal payments on financing lease equipment	(43)	(58)
Proceeds from public stock offering	18,171	0
Proceeds from stock options exercised	209	239
Net cash provided by (used in) financing activities	18,867	(2,348)
Net increase in cash and cash equivalents	13,370	1,682
Cash and cash equivalents at beginning of period	3,334	1,652
Cash and cash equivalents at end of period	16,704	3,334
SUPPLEMENTAL CASH FLOW INFORMATION:
Interest paid on leased assets	2	4
Interest paid on loan from officer	0	513
Income taxes paid	0	0
SUPPLEMENTAL DISCLOSURE OF NON CASH FINANCING ACTIVITIES:
Preferred stock dividends accrued	79	139
Conversion of preferred stock to common	$ 1,843	$ 0