Consolidated Balance Sheets (Current Period Unaudited) - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Current Assets:
Cash and cash equivalents	$ 11,987,000	$ 19,012,000
Contract and other receivables, net	1,080,000	915,000
Costs and estimated earnings in excess of billings on uncompleted contracts	1,511,000	806,000
Inventories, net	3,636,000	197,000
Prepaid expenses and other current assets	193,000	58,000
Total current assets	18,407,000	20,988,000
Property and equipment, net	384,000	662,000
Lease right-of-use assets	383,000	876,000
Goodwill	780,000	780,000
Intangible assets, net	149,000	217,000
Other assets	648,000	285,000
Total assets	20,751,000	23,808,000
Current Liabilities:
Accounts payable and accrued expenses	10,581,000	13,374,000
Deferred revenues	5,332,000	3,962,000
Current portion of long-term borrowings	2,011,000	0
Current portion of lease liabilities	404,000	748,000
Total current liabilities	18,328,000	18,084,000
Long-term borrowings	0	2,234,000
Non-current portion of lease liabilities	12,000	208,000
Non-current portion of deferred revenues	36,000	99,000
Total liabilities	18,376,000	20,625,000
Commitments and Contingencies
Stockholders’ Equity:
Preferred stock, $.0001 par value; 1,000 shares authorized at September 30, 2021 and December 31, 2020; none issued	0	0
Common stock, $.0001 par value; 49,000 shares authorized at September 30, 2021 and December 31, 2020; 19,938 and 19,055 issued; 18,596 and 17,958 outstanding at September 30, 2021 and December 31, 2020, respectively	2,000	2,000
Additional paid-in capital	70,450,000	70,070,000
Treasury stock 1,342 and 1,097 shares at cost at September 30, 2021 and December 31, 2020	(2,030,000)	(1,874,000)
Accumulated deficit	(66,047,000)	(65,015,000)
Total stockholders' equity	2,375,000	3,183,000
Total liabilities and stockholders’ equity	$ 20,751,000	$ 23,808,000