Condensed Consolidated Statements of Cash Flows - USD ($)	9 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities
Net loss	$ (9,680,210)	$ (13,644,601)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation of property, plant and equipment	238,677	379,450
Amortization of customer intangible assets	8,249	68,044
Stock-based compensation, net	796,500	1,554,567
Equity in loss of investee company	385,443	171,816
Provision for inventory reserve	57,988	234,675
Gain on sale of property, plant and equipment	(137,650)	(8,432)
Interest accreted on note receivable	(9,008)	(3,008)
Impairment of long-lived assets	447,000	0
Changes in assets and liabilities
Accounts receivable	(1,042,724)	(64,632)
Inventories	975,228	(312,715)
Costs and estimated earnings in excess of billings	(160,838)	0
Prepaids and other current assets	(428,077)	859,670
Deferred PPA project costs	0	5,690,307
Other assets	(86,360)	(4,727)
Accounts payable	1,077,290	60,895
Billings in excess of costs and estimated earnings	(417,210)	0
Accrued expenses	(207,259)	(120,754)
Deferred revenue	116,299	422,638
Other long-term liabilities	0	137,983
Net cash used in operating activities	(8,066,662)	(4,578,824)
Cash flows from investing activities
Expenditures for property and equipment	(34,377)	(46,364)
Proceeds from sale of property, plant and equipment	2,268,817	15,325
Payments from note receivable	18,000	0
Net cash provided by (used in) investing activities	2,252,440	(31,039)
Cash flows from financing activities
Repayments of long term debt	(678,984)	(248,533)
Proceeds from issuance of common stock	96,674	0
Proceeds from the exercise of stock options	0	68,400
Payments of tax withholding related to stock-based compensation	(38,663)	0
Contribution of capital from noncontrolling interest	1,956	0
Net cash used in financing activities	(619,017)	(180,133)
Effect of exchange rate changes on cash and cash equivalents	(83)	578
Net decrease in cash and cash equivalents	(6,433,322)	(4,789,418)
Cash and cash equivalents - beginning of period	11,782,962	17,189,089
Cash and cash equivalents - end of period	5,349,640	12,399,671
Supplemental disclosures of cash flow information:
Cash paid for interest	33,294	37,612
Supplemental noncash information:
Right of use asset obtained in exchange for new operating lease	$ 984,960	$ 178,124