Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Cash flows from operating activities:
Net loss	$ (2,373)	$ (2,743)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	24	23
Stock based compensation expense	246	528
Common stock issued for services	41	25
Provision for bad debt	100
Changes in assets and liabilities:
Accounts receivable	653	(1,670)
Notes receivable	(12)
Inventory	63
Prepaid expenses	252
Other current assets	(41)	(587)
Other non-current assets	(283)	35
Accounts payable	191	2,124
Accrued liabilities	85	(114)
Other non-current liabilities	156	(35)
Net cash used in operating activities	(898)	(2,414)
Cash flows from investing activities:
Purchase of property and equipment, net	(11)	(11)
Investment in note receivable, net		(38)
Net sales (purchases) of marketable securities	2,770	(1,106)
Net cash provided by (used in) investing activities	2,759	(1,155)
Cash flows from financing activities:
Advances on line of credit	150	3,400
Principal repayments on line of credit	(5,970)	(800)
Proceeds from SBA loans	411
Proceeds from exercise of stock options		7
Net cash provided by (used in) financing activities	(5,409)	2,607
Net change in cash and cash equivalents	(3,548)	(962)
Cash and cash equivalents at the beginning of the period	4,432	3,759	$ 3,759
Cash and cash equivalents at the end of the period	884	2,797	$ 4,432
Supplemental cash flow disclosures:
Cash paid for interest expense	32	51
Non-cash transactions:
Assets received offsetting notes receivable	$ 22
Equipment transferred against note receivable		$ 7