Condensed Consolidated Statements of Cash Flows - USD ($)	3 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash flows from operating activities
Net loss	$ (3,985,024)	$ (4,724,995)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation of property, plant and equipment	97,392	156,464
Stock-based compensation, net	435,608	272,653
Equity in (gain) loss of investee company	50,025	(23,655)
Provision for inventory reserve	54,928	140,690
Gain on sale of property and equipment	(70,000)	(8,432)
Interest accreted on note receivable	(3,024)	(3,024)
Impairment of long-lived assets	447,000	0
Changes in assets and liabilities
Accounts receivable	265,250	(264,078)
Inventories	84,523	(68,035)
Prepaids and other current assets	(165,413)	60,441
Costs and estimated earnings in excess of billings	(504,873)	0
Deferred PPA project costs	0	5,174,290
Deferred customer project costs	(9,000)	304,229
Project assets	21,961	516,017
Accounts payable	1,003,940	(119,542)
Billings in excess of costs and estimated earnings	(331,603)	0
Accrued expenses	(180,747)	579,447
Customer deposits	74,333	196,417
Accrued compensation and benefits	(77,952)	66,895
Deferred revenue	0	422,638
Other long-term liabilities	0	137,983
Net cash provided by (used in) operating activities	(2,792,676)	2,816,403
Cash flows from investing activities
Expenditures for property and equipment	0	(9,149)
Proceeds from sale of property and equipment	70,000	9,754
Payments from note receivable	6,000	0
Net cash provided by investing activities	76,000	605
Cash flows from financing activities
Repayments of long term debt	(84,348)	(82,236)
Proceeds from issuance of common stock	119,459	0
Contribution of capital from noncontrolling interest	1,956	0
Net cash provided by (used in) financing activities	37,067	(82,236)
Effect of exchange rate changes on cash and cash equivalents	626	(683)
Net increase (decrease) in cash and cash equivalents	(2,678,983)	2,734,089
Cash and cash equivalents - beginning of period	11,782,962	17,189,089
Cash and cash equivalents - end of period	9,103,979	19,923,178
Supplemental disclosures of cash flow information:
Cash paid for interest	11,452	10,520
Supplemental noncash information:
Right of use asset obtained in exchange for new operating lease	$ (19,467)	$ 102,943