CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 5,080,169	$ 1,358,454
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	689,293	747,553
Amortization of debt issue costs	101,280	240,081
Loss on disposal of equipment	62,140	0
Stock based compensation expense	1,164,221	88,041
Change in contract losses	(304,465)	(69,014)
Deferred income taxes	(2,871,680)	0
Gain from claims assignment settlement - noncash portion	(507,835)	0
Changes in operating assets and liabilities:
Accounts receivable	151,808	(1,196,117)
Costs incurred on uncompleted contracts, in excess of progress billings	298,421	(387,398)
Inventories - raw materials	(13,197)	6,217
Other current assets	108,692	7,411
Other noncurrent assets and liabilities	7,978	(193,906)
Accounts payable	(630,757)	(668,295)
Accrued expenses	(611,076)	180,687
Accrued taxes payable	(9,032)	9,032
Billings on uncompleted contracts, in excess of related costs	(986,187)	417,512
Advanced claims payment	0	507,835
Net cash provided by operating activities	1,729,773	1,048,093
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of property, plant and equipment	(787,808)	(17,600)
Capital expenditures for lighting project	0	(204,064)
Net cash used in investing activities	(787,808)	(221,664)
CASH FLOWS FROM FINANCING ACTIVITIES
Deferred loan costs	(198,449)	(100,472)
Proceeds from lighting project grant	0	204,064
Borrowings of long-term debt	6,227,500	0
Repayment of long-term debt	(5,236,617)	(933,651)
Net cash provided by (used in) financing activities	792,434	(830,059)
Effect of exchange rate on cash and cash equivalents	(409)	(529)
Net increase (decrease) in cash and cash equivalents	1,733,990	(4,159)
Cash and cash equivalents, beginning of period	1,332,166	1,336,325
Cash and cash equivalents, end of period	3,066,156	1,332,166
Cash paid during the year for:
Interest expense	789,743	683,871
Income taxes	65,000	0
SUPPLEMENTAL INFORMATION - NONCASH INVESTING AND FINANCING TRANSACTIONS:
Amount of increase from stock conversions		0
Assets held for sale	100,000	123,900
Property, plant and equipment and debt obligations	12,505,927	11,846,832
Assets Held Under Capital Leases [Member]
SUPPLEMENTAL INFORMATION - NONCASH INVESTING AND FINANCING TRANSACTIONS:
Property, plant and equipment and debt obligations	$ 54,376	65,568
Common Stock
SUPPLEMENTAL INFORMATION - NONCASH INVESTING AND FINANCING TRANSACTIONS:
Amount of increase from stock conversions		252
Additional Paid in Capital
SUPPLEMENTAL INFORMATION - NONCASH INVESTING AND FINANCING TRANSACTIONS:
Amount of increase from stock conversions		$ 523,958
Series A Convertible Preferred Stock
SUPPLEMENTAL INFORMATION - NONCASH INVESTING AND FINANCING TRANSACTIONS:
Number of shares of common stock issued for converted preferred stock		2,519,635
Shares converted into common stock		1,927,508