CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	3 Months Ended
Jun. 30, 2018	Jun. 30, 2017
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 164,385	$ 424,502
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Depreciation	185,585	171,613
Amortization of debt issue costs	15,231	19,544
Stock based compensation expense	24,930	99,388
Change in contract loss provision	(15,875)	130,662
Deferred income taxes	65,029	273,528
Changes in operating assets and liabilities:
Accounts receivable	730,574	641,353
Inventories	(48,518)	(1,294,314)
Contract assets	(2,119,085)	0
Other current assets	34,868	(38,214)
Other noncurrent assets and liabilities	0	(4,839)
Accounts payable	(12,907)	199,423
Accrued expenses	118,339	15,254
Accrued taxes payable	0	4,403
Contract liabilities	567,517	(68,522)
Net cash (used in) provided by operating activities	(289,927)	573,781
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of property, plant and equipment	(101,695)	(212,946)
Proceeds from sale of equipment	0	80,000
Net cash used in investing activities	(101,695)	(132,946)
CASH FLOWS FROM FINANCING ACTIVITIES
Repayment of long-term debt	(186,896)	(174,591)
Net cash used in financing activities	(186,896)	(174,591)
Effect of exchange rate on cash and cash equivalents	661	(186)
Net (decrease) increase in cash and cash equivalents	(577,857)	266,058
Cash and cash equivalents, beginning of period	2,689,110	3,066,156
Cash and cash equivalents, end of period	2,111,253	3,332,214
Cash paid during the year for:
Interest expense	80,066	93,905
Income taxes	$ 0	$ 10,000

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