CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) - USD ($)	3 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
CASH FLOWS FROM OPERATING ACTIVITIES
Net income (loss)	$ 1,371,092	$ (116,234)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation	182,678	169,237
Amortization of debt issue costs	8,824	15,141
Stock based compensation expense	33,500	55,500
Change in contract loss provision	(69,951)	(64,699)
Deferred income taxes	26,580	(37,360)
PPP loan forgiveness	(1,317,100)
Changes in operating assets and liabilities:
Accounts receivable	(547,344)	73,771
Contract assets	716,600	(692,842)
Inventories	239,012	(79,834)
Other current assets	3,607	187,261
Accounts payable	(331,079)	370,914
Accrued expenses	(389,586)	38,614
Contract liabilities	210,215	(288,712)
Net cash provided by (used in) operating activities	137,048	(369,243)
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of property, plant and equipment	(4,198)	(41,768)
Net cash used in investing activities	(4,198)	(41,768)
CASH FLOWS FROM FINANCING ACTIVITIES
Debt issue costs		(8,282)
Proceeds from payroll protection program		1,317,100
Proceeds from revolver loan		1,000,000
Repayment of revolver loan		(1,000,000)
Repayment of long-term debt	(27,166)	(26,618)
Net cash (used in) provided by financing activities	(27,166)	1,282,200
Effect of exchange rate on cash and cash equivalents	(20)	(6)
Net increase in cash and cash equivalents	105,664	871,183
Cash and cash equivalents, beginning of period	2,130,711	930,856
Cash and cash equivalents, end of period	2,236,375	1,802,039
Cash paid during the year for:
Interest	$ 32,746	$ 40,024