Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	6 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 1,855,121	$ 1,708,347
Adjustments to reconcile net income to net cash provided by operating activities:
Gain (Loss) on sale of property and equipment	1,661	(1,091)
Change in inventory reserves	(276,494)	24,946
Change in accounts receivable reserves	(74,261)	(23,849)
Depreciation, amortization and impairment	3,322,306	928,365
Change in cash surrender value of life insurance	(22,045)	(20,599)
Gain on asset retirement obligation		(562,500)
Bargain purchase acquisition gain	(1,983,777)	(501,880)
Change in warranty reserve	(980)	906
Other-than-temporary impairment loss on investments		771,173
Unrealized loss on marketable securities	99,471
Unrealized gain on interest rate swap	(145,222)
Change in operating assets and liabilities:
Accounts receivable	(1,462,724)	(236,911)
Costs and estimated earnings in excess of billings and uncompleted projects	2,012,121
Notes receivable and other non-trade receivables	(2,735,178)	155,049
Inventories	9,969,314	4,899,652
Prepaid expense and other assets	(559,682)	488,537
Accounts payable	3,262,959	129,166
Accrued expenses	1,908,945	(196,594)
Income taxes payable/receivable	(541,051)	(651,923)
Non-current liabilities	240,745	125,278
Total adjustments	13,016,108	5,327,725
Net cash provided by operating activities	14,871,229	7,036,072
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of marketable securities	(2,013,921)	(734,600)
Acquisition of businesses, net of cash acquired	(3,375,700)	(2,900,000)
Cash used for equity method investments	(263,492)
Investment in reinsurance entity	(2,000,000)
Capital expenditures	(19,973,209)	(8,259,215)
Proceeds from sale of property and equipment	50,602	1,861
Net cash used in investing activities	(27,575,720)	(11,891,954)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from lines of credit	51,151,570	48,450,994
Payments on lines of credit	(58,355,499)	(46,617,448)
Proceeds from term loan	21,714,000	2,400,000
Payments on term loan	(3,190,136)	(800,000)
Debt issuance costs	(107,844)
Proceeds from loan against cash surrender value of life insurance policies	1,896,788
Distribution to non-controlling member	(55,837)
Contribution from non-controlling member	210,000
Payments for repurchase of stock	(22,759)
Proceeds from exercise of stock options	17,762
Net cash provided by financing activities	13,258,045	3,433,546
Effect of foreign currency exchange rates on cash and cash equivalents	4,886	17,890
NET INCREASE/ (DECREASE) IN CASH AND CASH EQUIVALENTS AND RESTRICTED CASH	558,440	(1,404,446)
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH AT BEGINNING OF PERIOD	5,072,897	3,653,734
CASH AND CASH EQUIVALENTS AND RESTRICTED CASH AT END OF PERIOD	5,631,337	2,249,288
Equipment leased to customers transferred to inventory	234,151
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Interest	1,149,603	382,535
Income taxes	$ 358,051	$ 1,312,980