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CONDENSED STATEMENTS OF CASH FLOWS (USD $)
 3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Cash flows from operating activities    
Net loss $ (2,038,392) $ (1,409,533)
Adjustments to reconcile net loss to net cash provided by (used by) operating activities:    
Depreciation and amortization 326,482 314,179
loss on disposal of assets   (1,000)
(Increase) decrease in assets:    
Inventories 331,314 (201,770)
Accounts receivable 301,994 536,846
Other current assets 461,559 483,634
Increase (decrease) in liabilities:    
Accounts payable (1,262,123) (1,836,871)
Other accrued liabilities (693,437) (17,770)
Income taxes payable (86,165) 1,876
Net cash used by operating activities (2,658,768) (2,130,409)
Cash flows from investing activities    
Purchase of property, plant, and equipment (738,597) (63,890)
Proceeds from sale of assets   1,000
Net cash used by investing activities (738,597) (62,890)
Cash flows from financing activities    
Repayments of long-term debt and notes payable (82,214) (77,657)
Repurchase of Common Stock   (101,672)
Proceeds from the exercise of stock options 106,289  
Payment of Preferred Stock dividends (57,613) (57,613)
Net cash used by financing activities (33,538) (236,942)
Net decrease in cash and cash equivalents (3,430,903) (2,430,241)
Cash and cash equivalents at:    
Beginning of period 27,629,359 25,963,313
End of period 24,198,456 23,533,072
Supplemental schedule of cash flow information:    
Interest paid 57,168 62,537
Income taxes paid 87,995  
Supplemental schedule of noncash investing and financing activities:    
Preferred dividends declared, not paid $ 57,613 $ 57,613