Consolidated Balance Sheets - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 503	$ 1,715
Trade accounts receivable, net of allowance for doubtful accounts of $39,169 at December 31, 2019 and $40,000 at December 31, 2018	2,152,254	2,325,804
Inventories	2,468,648	3,685,059
Assets held for sale, net	0	688,750
Prepaid expenses and other current assets	257,859	389,390
Total current assets	4,879,264	7,090,718
Property, plant and equipment, net	3,801,916	5,131,773
Intangible assets, net	47,509	53,155
Other assets	5,645	5,140
Total assets	8,734,334	12,280,786
Current liabilities:
Revolving line of credit	1,274,299	2,025,592
Term notes payable, current portion, net	3,557,458	389,420
Accounts payable	841,068	1,200,298
Accrued expenses and other current liabilities	383,836	459,108
Contract liabilities, current portion	5,472	560,802
Total current liabilities	6,062,133	4,635,220
Long-term liabilities:
Term notes payable, non-current portion, net	0	3,557,458
Subordinated promissory notes, net	470,152	0
Total long-term liabilities	470,152	3,557,458
Total liabilities	6,532,285	8,192,678
Commitments and Contingencies
Shareholders' equity:
Preferred stock, $0.001 par value; 2,000,000 shares authorized, none issued	0	0
Common stock, $0.01 par value; 10,000,000 shares authorized; 3,926,491 issued, 2,906,609 outstanding at December 31, 2019 and 3,926,491 issued, 2,861,008 outstanding at December 31, 2018	39,265	39,265
Additional paid-in-capital	11,735,457	11,604,817
Treasury stock at cost, 1,019,882 shares at December 31, 2019 and 1,065,483 shares at December 31, 2018	(2,783,055)	(2,907,490)
Accumulated deficit	(6,789,618)	(4,648,484)
Total shareholders’ equity	2,202,049	4,088,108
Total liabilities and shareholders’ equity	$ 8,734,334	$ 12,280,786