CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	9 Months Ended
Dec. 31, 2018	Dec. 31, 2017
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 563,122	$ 101,297
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	558,571	523,640
Amortization of debt issue costs	43,638	53,964
Stock based compensation expense	106,727	226,935
Change in contract loss provision	24,541	(43,815)
Deferred income taxes	177,104	904,243
Changes in operating assets and liabilities:
Accounts receivable	1,299,194	261,084
Inventories	(1,004,145)	(385,013)
Contract assets	(5,912,297)	(65,500)
Other current assets	(14,174)	(87,682)
Other noncurrent assets and liabilities	(7,245)	(14,516)
Accounts payable	279,893	(106,273)
Accrued expenses	202,860	(28,712)
Contract liabilities	3,803,087	(66,121)
Net cash provided by operating activities	120,876	1,273,531
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of property, plant and equipment	(402,880)	(914,648)
Proceeds from sale of equipment	0	80,000
Net cash used in investing activities	(402,880)	(834,648)
CASH FLOWS FROM FINANCING ACTIVITIES
Repayment of long-term debt	(569,809)	(533,297)
Net cash used in financing activities	(569,809)	(533,297)
Effect of exchange rate on cash and cash equivalents	628	(713)
Net decrease in cash and cash equivalents	(851,185)	(95,127)
Cash and cash equivalents, beginning of period	2,689,110	3,066,156
Cash and cash equivalents, end of period	1,837,925	2,971,029
Cash paid during the year for:
Interest expense	230,310	275,216
Income taxes	$ 0	$ 30,000

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