Condensed Consolidated Statements of Cash Flows - USD ($)	6 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Cash flows from operating activities
Net loss	$ (6,596,468)	$ (9,061,765)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation of property, plant and equipment	180,080	290,132
Amortization of customer intangible assets	3,330	68,044
Stock-based compensation, net	601,472	1,055,105
Equity in loss of investee company	138,463	1,732
Provision for inventory reserve	57,988	181,197
Gain on sale of property and equipment	(76,521)	(8,432)
Interest accreted on note receivable	(6,049)	(6,049)
Impairment of long-lived assets	447,000	0
Changes in assets and liabilities
Accounts receivable	53,076	(203,639)
Inventories	857,752	(150,332)
Costs and estimated earnings in excess of billings	(2,212,558)	0
Prepaids and other current assets	(227,821)	1,785,328
Deferred PPA project costs	0	5,690,307
Other assets	(86,360)	0
Accounts payable	1,397,147	112
Billings in excess of costs and estimated earnings	(406,062)	0
Accrued expenses	(4,897)	271,467
Deferred revenue	0	422,638
Other long-term liabilities	0	137,983
Net cash provided by (used in) operating activities	(5,880,428)	473,828
Cash flows from investing activities
Expenditures for property and equipment	(16,169)	(9,149)
Proceeds from sale of property and equipment	81,500	9,754
Payments from note receivable	12,000	0
Net cash provided by investing activities	77,331	605
Cash flows from financing activities
Repayments of long term debt	(169,306)	(165,083)
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	(109,339)	(96,683)
Effect of exchange rate changes on cash and cash equivalents	609	(568)
Net increase (decrease) in cash and cash equivalents	(5,911,827)	377,182
Cash and cash equivalents - beginning of period	11,782,962	17,189,089
Cash and cash equivalents - end of period	5,871,135	17,566,271
Supplemental disclosures of cash flow information:
Cash paid for interest	22,543	26,332
Supplemental noncash information:
Right of use asset obtained in exchange for new operating lease	$ 1,020,579	$ 102,943