CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) - USD ($)	6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
CASH FLOWS FROM OPERATING ACTIVITIES
Net income (loss)	$ 154,530	$ (70,244)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation	339,232	380,030
Amortization of debt issue costs	31,086	20,770
Stock based compensation expense	112,917	61,250
Change in contract loss provision	(49,553)	186,603
Deferred income taxes	73,942	(17,358)
Changes in operating assets and liabilities:
Accounts receivable	(388,317)	183,602
Contract assets	(1,475,912)	801,811
Inventories	126,457	(662,650)
Other current assets	320,847	(121,774)
Accounts payable	25,308	174,311
Accrued expenses	158,791	(73,954)
Contract liabilities	(168,854)	75,438
Net cash (used in) provided by operating activities	(739,526)	937,835
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of property, plant and equipment	(354,788)	(11,544)
Net cash used in investing activities	(354,788)	(11,544)
CASH FLOWS FROM FINANCING ACTIVITIES
Debt issue costs	(8,282)	(5,835)
Proceeds from payroll protection program	1,317,100	0
Proceeds from revolver loan	1,000,000	0
Repayment of revolver loan	(1,000,000)	0
Repayment of long-term debt	(53,614)	(402,889)
Net cash provided by (used in) financing activities	1,255,204	(408,724)
Effect of exchange rate on cash and cash equivalents	(133)	299
Net increase in cash and cash equivalents	160,757	517,866
Cash and cash equivalents, beginning of period	930,856	2,036,646
Cash and cash equivalents, end of period	$ 1,091,613	$ 2,554,512