CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $)	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (1,190,873)	$ (1,361,426)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	79,562	91,680
Loss on equipment disposal	0	97
Provision for inventory reserves	0	(73,830)
Non-cash stock based compensation expense	41,069	91,590
Changes in assets and liabilities:
Accounts receivable	401,201	450,911
Other receivable	51,630	800
Inventory	372	498,495
Prepaid expenses, deposits and other assets	76,588	(42,712)
Accounts payable	(184,660)	47,965
Billings in excess of costs	(2,152)	33,062
Accrued expenses and deposits	(541,371)	(395,041)
Net cash used in operating activities	(1,268,634)	(658,409)
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of land, building and equipment	0	(2,528)
Proceeds from disposal of equipment	0	3,400
Net cash provided by investing activities	0	872
CASH FLOWS FROM FINANCING ACTIVITIES:
Dividends paid (preferred stock)	(43,539)	0
Exercise of stock options	0	1,575
Net cash provided by (used in) financing activities	(43,539)	1,575
Net decrease in cash and cash equivalents	(1,312,173)	(655,962)
Cash and cash equivalents, beginning of period	3,937,135	8,983,281
Cash and cash equivalents, end of period	$ 2,624,962	$ 8,327,319