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CONDENSED STATEMENTS OF CASH FLOWS (USD $)
 6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Cash flows from operating activities    
Net income (loss) $ 2,570,829 $ (5,036,574)
Adjustments to reconcile net income (loss) to net cash provided by (used by) operating activities:    
Depreciation and amortization 654,666 788,680
Stock option compensation   1,340,300
Provisions for doubtful accounts 854,959  
Provision for inventory valuation 52,835  
Reserve for non-contractual deductions   850,000
Accreted interest 10,540 17,054
Impairment of assets   163,039
(Increase) decrease in assets:    
Inventories 545,101 (3,761,831)
Accounts receivable 2,438,644 3,296,802
Income taxes receivable 58 (334,483)
Other current assets 466,754 (172,224)
Increase (decrease) in liabilities:    
Accounts payable (546,369) (2,290,929)
Accrued liabilities, other (2,735,373) 864,293
Income taxes payable (77,534)  
Net cash provided by (used by) operating activities 4,235,110 (4,275,873)
Cash flows from investing activities    
Purchase of property, plant, and equipment (464,689) (18,597)
Net cash used by investing activities (464,689) (18,597)
Cash flows from financing activities    
Repayments of long-term debt and notes payable (283,431) (2,398,515)
Proceeds from the exercise of stock options 37,278  
Net cash used by financing activities (246,153) (2,398,515)
Net increase (decrease) in cash and cash equivalents 3,524,268 (6,692,985)
Cash and cash equivalents at:    
Beginning of period 23,266,039 18,126,084
End of period 26,790,307 11,433,099
Supplemental disclosures of cash flow information:    
Interest paid 139,933 179,024
Income taxes paid 130,000 15,755
Supplemental schedule of noncash financing activities:    
Preferred dividends declared 291,700 876,566
Debt assumed for the purchase of molding machines $ 327,725