Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash flows from operating activities
Net loss	$ (13,324,541)	$ (4,441,863)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation of property, plant and equipment	288,168	483,636
Amortization of customer intangible assets	8,249	68,044
Stock-based compensation, net	1,142,749	2,145,765
Equity in loss of investee company	307,674	217,898
Provision for inventory reserve	354,000	182,647
Gain on sale of property, plant and equipment	(73,647)	(1,911)
Interest accreted on note receivable	(10,981)	(12,000)
Allowance for note receivable	162,121	0
Gain on termination of SPI Supply Agreement	0	(13,290,000)
Impairment of long-lived assets	447,000	0
Changes in assets and liabilities
Accounts receivable	254,897	(297,273)
Inventories	907,565	(794,718)
Costs and estimated earnings in excess of billings	(440,948)	(87,318)
Prepaids and other current assets	(478,119)	1,756,979
Deferred PPA project costs	0	5,690,307
Other assets	(86,360)	(4,727)
Accounts payable	655,071	(82,041)
Billings in excess of costs and estimated earnings	(280,656)	456,950
Accrued expenses	(127,646)	227,474
Deferred revenue	116,299	422,638
Other long-term liabilities	16,793	145,013
Net cash used in operating activities	(10,162,312)	(7,214,500)
Cash flows from investing activities
Expenditures for property and equipment	(288,846)	(46,366)
Proceeds from sale of property, plant and equipment	2,299,017	8,432
Payments from note receivable	20,000	12,000
Net cash provided by (used in) investing activities	2,030,171	(25,934)
Cash flows from financing activities
Repayments of long term debt	(726,256)	(332,344)
Proceeds from issuance of common stock	96,674	2,095,840
Proceeds from the exercise of stock options	0	69,960
Payments of tax withholding related to stock-based compensation	(38,663)	0
Contribution of capital from noncontrolling interest	1,956	0
Net cash provided by (used in) financing activities	(666,289)	1,833,456
Effect of exchange rate changes on cash and cash equivalents	0	851
Net decrease in cash and cash equivalents	(8,798,430)	(5,406,127)
Cash and cash equivalents - beginning of period	11,782,962	17,189,089
Cash and cash equivalents - end of period	2,984,532	11,782,962
Supplemental disclosures of cash flow information:
Cash paid for interest	40,888	51,134
Supplemental noncash information:
Right of use asset obtained in exchange for new operating lease	$ 937,035	$ 122,950