CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $)	6 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Cash flows from operating activities:
Net income (loss)	$ 22,521	$ (363,406)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Deferred income taxes	284,220	(244,288)
Depreciation and amortization	112,265	109,447
Provision for inventory obsolescence	(260,000)
Gain on sale of asset		(3,600)
Amortization of debt discount	26,791	14,514
Increase in cash surrender value of life insurance	2,011
Gain on proceeds from life insurance policy	(300,029)
Change in fair value of common stock warrant	63,695
Non-cash stock-based compensation	46,494	49,028
Changes in assets and liabilities:
Decrease (increase) in accounts receivable	1,130,256	(1,092,481)
Decrease (increase) in inventories	584,560	(1,169,537)
(Increase) decrease in prepaid expenses & other	(50,638)	4,776
(Increase) decrease in other assets	(42,100)	8,302
(Decrease) increase in accounts payable	(1,161,438)	788,491
(Decrease) increase in accrued payroll, vacation pay & withholdings	(26,629)	145,740
Decrease in deferred revenues	(11,063)	(26,412)
(Decrease) increase in progress billings	(424,202)	446,090
Increase in accrued expenses	613,335	321,269
Net cash provided by (used in) operating activities	610,049	(1,026,581)
Cash flows from investing activities:
Proceeds from the sale of capital asset		3,600
Purchases of equipment	(79,772)	(93,890)
Net cash used in investing activities	(79,772)	(90,290)
Cash flows from financing activities:
Proceeds from the issuance of common stock		50,000
Proceeds from the exercise of stock options	20,464	9,925
Proceeds from long-term debt		2,500,000
Expenses associated with long-term debt		(527,796)
Repayment of long-term debt	(39,405)
Repayment of capitalized lease obligations	(15,685)
Proceeds from borrowings from line of credit		400,000
Repayment of line of credit		(1,000,000)
Proceeds from life insurance policy	312,683
Net cash provided by financing activities	278,057	1,432,129
Net increase in cash and cash equivalents	808,334	315,258
Cash and cash equivalents at beginning of period	123,955	173,048
Cash and cash equivalents at end of period	932,289	488,306
Taxes paid	0	0
Interest paid	173,882	49,221
Capitalized lease obligations	$ 67,772