CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $)	3 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Cash flows from operating activities:
Net income (loss)	$ 175,849	$ (275,412)
Adjustments to reconcile net loss to net cash used in operating activities:
Deferred income taxes	25,373	(185,940)
Depreciation and amortization	56,961	42,310
Provision for inventory obsolescence	10,000
Gain on sale of asset		(3,600)
Amortization of debt discount	13,395	5,769
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	168,586
Non-cash stock-based compensation	24,231	23,665
Changes in assets and liabilities:
Decrease in accounts receivable	870,875	96,358
Decrease (increase) in inventories	439,886	(119,697)
Increase in prepaid expenses & other	(3,569)	(2,789)
Increase in other assets	(32,316)	(20,278)
Decrease in accounts payable	(868,419)	(12,501)
(Decrease) increase in accrued payroll, vacation pay and payroll taxes	(1,381)	65,486
Decrease in deferred revenues	(13,276)	(22,378)
(Decrease) increase in progress billings	(424,202)	450,694
Increase (decrease) in accrued expenses	164,353	(133,095)
Net cash provided by (used in) operating activities	308,329	(91,408)
Cash flows from investing activities:
Proceeds from the sale of capital asset		3,600
Purchases of equipment		(86,801)
Net cash used in investing activities		(83,201)
Cash flows from financing activities:
Proceeds from the exercise of stock options	5,390	6,075
Repayment of capitalized lease obligations	(8,332)
Proceeds from borrowings from line of credit		150,000
Proceeds from life insurance policy	285,981
Net cash provided by financing activities	283,039	156,075
Net increase (decrease) in cash and cash equivalents	591,368	(18,534)
Cash and cash equivalents at beginning of period	123,955	173,048
Cash and cash equivalents at end of period	715,323	154,514
Taxes paid	0	0
Interest paid	$ 87,192	$ 9,269