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CONDENSED STATEMENTS OF CASH FLOWS - USD ($)
 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Cash flows from operating activities    
Net loss $ (2,605,917) $ (1,721,089)
Adjustments to reconcile net loss to net cash used by operating activities:    
Recoveries for doubtful accounts (81,152)  
Provision for doubtful accounts   92,000
Share-based compensation 652,860 84,651
Depreciation and amortization 603,582 672,000
(Increase) decrease in assets:    
Accounts receivable (1,897,332) (352,444)
Inventories (336,023) (908,099)
Other current assets (313,108) 1,338,622
Other assets   (750)
Increase (decrease) in liabilities:    
Accounts payable 574,258 (988,248)
Other accrued liabilities 507,768 139,817
Income taxes payable   2,717
Insurance proceeds 876,250  
Net cash used by operating activities (2,018,814) (1,640,823)
Cash flows from investing activities    
Purchase of property, plant, and equipment (172,305) (1,671,649)
Net cash used by investing activities (172,305) (1,671,649)
Cash flows from financing activities    
Repayments of long-term debt and notes payable (326,227) (187,418)
Proceeds from the sale of common stock 2,350,100  
Proceeds from the exercise of stock options   839,200
Payment of Preferred Stock dividends (165,339) (165,640)
Net cash provided by financing activities 1,858,534 486,142
Net decrease in cash and cash equivalents (332,585) (2,826,330)
Cash and cash equivalents at:    
Beginning of period 16,199,043 18,045,044
End of period 15,866,458 15,218,714
Supplemental schedule of cash flow information:    
Interest paid 159,053 158,325
Income taxes paid   2,025
Supplemental schedule of noncash investing and financing activities:    
Preferred dividends declared, not paid $ 55,113 $ 55,113