STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash flows from operating activities
Net income (loss)	$ (3,694,907)	$ 4,314,318	$ (2,354,605)
Adjustments to reconcile net income (loss) to net cash provided (used) by operating activities:
Depreciation and amortization	872,868	858,391	1,074,520
Share based compensation	387,726
Inventories reserve	176,424
Provision for doubtful accounts	92,000	116,395	27,300
Impairment of assets	456,119
(Increase) decrease in assets:
Inventories	(897,023)	(1,633,077)	1,072,041
Accounts receivable	1,541,159	624,699	(2,192,673)
Other current assets	1,375,484	(373,977)	(128,414)
Other assets	(750)
Increase (decrease) in liabilities:
Accounts payable	(1,225,762)	554,722	35,018
Litigation proceeds subject to stipulation		(7,724,826)
Other accrued liabilities	119,342	11,312	(1,318,327)
Income taxes payable	2,408	(114)	(82,682)
Net cash used by operating activities	(794,912)	(3,252,157)	(3,867,822)
Cash flows from investing activities
Purchase of property, plant, and equipment	(1,947,172)	(1,465,010)	(1,007,933)
Changes in restricted cash		600,897	(600,897)
Net cash used by investing activities	(1,947,172)	(864,113)	(1,608,830)
Cash flows from financing activities
Repayments of long-term debt and notes payable	(263,200)	(184,447)	(249,220)
Proceeds from long-term debt	525,017	276,495
Proceeds from the exercise of stock options	855,021	283,933	398,328
Stock registration fees		(60,101)
Payment of Preferred Stock dividends	(220,755)	(283,543)	(172,838)
Net cash provided (used) by financing activities	896,083	32,337	(23,730)
Net decrease in cash and cash equivalents	(1,846,001)	(4,083,933)	(5,500,382)
Cash and cash equivalents at:
Beginning of period	18,045,044	22,128,977	27,629,359
End of period	16,199,043	18,045,044	22,128,977
Supplemental schedule of cash flow information:
Interest paid	213,295	219,672	222,808
Income taxes paid	2,000	3,700	$ 94,332
Supplemental schedule of noncash investing and financing activities:
Preferred dividends declared, not paid	$ 55,113	$ 55,414