Consolidated Balance Sheets - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Current assets
Cash	$ 1,217,014	$ 4,264,767
Accounts receivable, net	3,850,509	2,273,189
Prepaid expenses	139,070	133,607
Inventories	924,032	1,003,623
Asset held for sale	252,704
Other current assets	252,178
Total current assets	6,635,507	7,675,186
Property, plant and equipment, net	8,045,692	8,226,009
Intangible assets, net	1,986,111	3,686,111
Other noncurrent assets	93,619	51,887
Total assets	16,760,929	19,639,193
Current liabilities
Accounts payable	961,294	721,361
Accrued expenses	683,832	631,860
Customer deposits	61,421
Current portion of long-term debt, net of discounts	4,102,543	4,578,759
Total current liabilities	5,809,090	5,931,980
Long-term debt, less current portion, net of discounts	3,848,863	6,296,994
Total liabilities	9,657,953	12,228,974
Commitments and contingencies (Notes 7 and 8)
Shareholders' equity
Common stock - $0.001 par value; 100,000,000 shares authorized; 25,418,126 and 25,018,098 shares outstanding, respectively	25,418	25,018
Additional paid-in-capital	40,069,391	39,440,611
Accumulated deficit	(32,991,833)	(32,055,410)
Total shareholders' equity	7,102,976	7,410,219
Total liabilities and shareholders' equity	$ 16,760,929	$ 19,639,193