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CONDENSED STATEMENTS OF CASH FLOWS (USD $)
 3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Operating activities    
Net (loss) income $ (71,424) $ 74,802
Adjustments to reconcile net (loss) income to net cash provided by (used in) operating activities:    
Stock-based compensation 52,246 93,735
Depreciation and amortization 79,841 66,959
Deferred income tax expense 7,985 7,985
Changes in operating assets and liabilities:    
Accounts receivable (280,856) (425,228)
Inventories 409,241 (66,972)
Prepaid expenses and other current assets (88,662) (148,487)
Accounts payable 61,202 247,649
Accrued payroll and related expenses (51,679) 56,823
Deferred income on shipments to distributors (101,328) (169,322)
Deferred service revenue (439) (19,028)
Change in deferred rent 10,530 14,093
Net cash provided by (used in) operating activities 26,657 (266,991)
Investing activities    
Purchases of equipment (8,100)   
Net cash used in investing activities (8,100)   
Financing activities    
Payments on capital leases (5,550) (4,269)
Proceeds from borrowings under bank line of credit agreement 943,871 1,597,759
Repayments of borrowings under bank line of credit agreement (892,787) (1,532,940)
Proceeds from the issuance of related party and other short term notes payable    550,000
Repayment of short term note payable    (95,289)
Net cash provided by financing activities 45,534 515,261
Net increase in cash and cash equivalents 64,091 248,270
Cash and cash equivalents at beginning of period 606,255 390,513
Cash and cash equivalents at end of period 670,346 638,783
Supplemental cash flow information    
Cash paid for interest $ 102,329 $ 68,433