Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Cash Flows from Operating Activities:
Net income	$ 126	$ 2,437
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	370	385
Stock-based compensation	358	241
Gain on sale of business component		(1,140)
Amortization of discount on note payable	82	81
Non-cash interest	108	101
Changes in operating assets and liabilities:
Contracts and other receivables	(3,138)	(478)
Costs and estimated earnings in excess of billings on uncompleted contracts	(27)	(84)
Inventories, net	(1,245)	26
Prepaid expenses and other current assets	(17)	21
Right-of-use assets	530
Accounts payable and accrued expenses	6,461	369
Deferred revenues	(75)	(126)
Operating lease liabilities	(518)
Other liabilities		67
Net cash provided by operating activities	3,015	1,900
Cash Flows from Investing Activities:
Capital expenditures	(594)	(242)
Proceeds from sale of business component	175	2,144
Net cash provided by (used in) investing activities	(419)	1,902
Cash Flows from Financing Activities:
Repurchase of treasury stock	(158)	(6)
Proceeds from issuance of stock	62	114
Net cash provided by (used in) financing activities	(96)	108
Net increase in cash	2,500	3,910
Cash, beginning of period	6,178	2,268
Cash, end of period	8,678	6,178
Supplemental disclosure of cash flow information:
Cash paid for interest	231	223
Cash paid for taxes	$ 71	$ 57