Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 4,290	$ 5,724
Restricted cash	511	806
Accounts receivable, net	5,020	4,488
Account receivable-due from government awards	367	292
Unbilled accounts receivable	1,318	1,102
Inventories	7,661	7,632
Prepaid expenses and other current assets	672	691
Total current assets	19,839	20,735
Property, plant and equipment, net	37,499	30,483
Operating lease right-of-use assets	84	113
Intangibles and other assets	33	37
Total assets	57,455	51,368
Current liabilities:
Accounts payable	1,160	1,348
Accrued compensation	2,181	1,664
Revolving credit facility, net	2,087	1,974
Common stock warrant liability	2	1,374
Other accrued expenses	391	722
Deferred revenue	114	54
Operating lease liability - current	63	60
Finance lease liability - current	1,127	1,133
Other current liabilities	366	608
Total current liabilities	7,491	8,937
Other liability - long term	28	28
Deferred income - government awards - long term	19,161	12,458
Operating lease liability - long term	22	54
Finance lease liability - long term	11,647	11,647
Total liabilities	38,349	33,124
Commitments and contingencies (Note 8)
Shareholders' equity:
Preferred stock, $.001 par value: authorized 10,000,000 shares: Series B Convertible Preferred stock, (liquidation preference of $5,659) stated value $1,000 per share, $0.001 par value: 10,000 shares designated and 5,659 issued and outstanding as of June 30, 2022 and December 31, 2021.
Common stock, $0.001 par value: authorized 200,000,000 shares, issued 75,621,126 shares, outstanding 75,459,060 shares as of June 30, 2022 and issued 72,931,490 shares, outstanding 72,769,424 shares as of December 31, 2021.	75	72
Additional paid-in capital	278,372	275,936
Accumulated deficit	(258,841)	(257,264)
Treasury stock, 162,066 shares as of June 30, 2022 and December 31, 2021.	(500)	(500)
Total shareholders' equity	19,106	18,244
Total liabilities and shareholders' equity	$ 57,455	$ 51,368