Document And Entity Information [Abstract] Document Information [Table] Class of Stock [Axis] Statement of Financial Position [Abstract] Statement [Table] Current assets: Current assets: Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents Cash and cash equivalents - beginning of period Cash and cash equivalents - end of period Accounts receivable, net Accounts receivable, net Inventories, net Inventories, net Total Prepaid expenses and other current assets Prepaid expenses and other current assets Customer intangible assets Customer intangible assets Net carrying value Financing Receivable, Net Note receivable Deferred Costs, Current Deferred PPA project costs Other Deferred Costs, Net Deferred customer project costs Project assets Project assets It represents project assets. Assets, Current Total current assets Long-term assets: Long-term assets: Property, plant and equipment, net Property, plant and equipment, net Property, plant and equipment, net Equity Method Investments Investment in investee company Goodwill Goodwill Beginning balance Ending balance Right of use assets-operating leases Right of use assets-operating leases Assets Total assets Assets [Abstract] Current liabilities: Current liabilities: Current maturities of long-term debt Current maturities of long-term debt Accounts payable Accounts payable Accrued Liabilities, Current Accrued expenses Customer deposits Customer deposits Deferred Revenue Current Accrued compensation and benefits Accrued compensation and benefits Liabilities, Current Total current liabilities Long-term liabilities: Long-term liabilities: Long-term debt, net of current maturities Long-term debt, net of current maturities Deferred Revenue, Noncurrent Deferred revenue Deferred Revenue Noncurrent Other long-term liabilities Other long-term liabilities Liabilities Total liabilities Commitments and contingencies (Note 15) Commitments and contingencies (Note 15) Liabilities and Equity [Abstract] Liabilities and Equity Series B redeemable convertible preferred stock ($0.01 par value, $1,000 face value) 3,000 shares authorized and issued, 2,300 and 2,575 shares outstanding, preference in liquidation of $5,317,800 and $5,635,866 as of June 30, 2016 and June 30, 2015, respectively Series B redeemable convertible preferred stock ($0.01 par value, $1,000 face value) 3,000 shares authorized and issued, 2,300 shares outstanding, preference in liquidation of $5,549,840 and $5,317,800 as of March 31, 2017 and June 30, 2016, respectively Series C convertible preferred stock ($0.01 par value, $1,000 face value), 28,048 and 0 shares authorized, issued, and outstanding, preference in liquidation of $12,719,260 and $0 as of June 30, 2016 and June 30, 2015, respectively Series C convertible preferred stock ($0.01 par value, $1,000 face value), 28,048 shares authorized, issued, and outstanding, preference in liquidation of $466,472 and $12,719,260 as of March 31, 2017 and June 30, 2016, respectively It represents preferred C stock value. Common stock ($0.01 par value); 300,000,000 and 150,000,000 authorized, 47,752,821 and 39,129,334 shares issued and outstanding as of June 30, 2016 and June 30, 2015, respectively Common stock ($0.01 par value); 300,000,000 authorized, 48,010,347 and 47,752,821 shares issued and outstanding as of March 31, 2017 and June 30, 2016, respectively Additional paid-in capital Additional paid-in capital Accumulated deficit Accumulated deficit Accumulated other comprehensive loss Accumulated other comprehensive loss Total EnSync, Inc. Equity Total EnSync, Inc. equity Beginning Balance Total EnSync, Inc. Equity Ending Balance Total EnSync, Inc. equity as of March 31, 2017 Noncontrolling interest Noncontrolling interest Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Total equity Liabilities and Equity Total liabilities and equity Class of Stock [Domain] Series B Redeemable Convertible Preferred Stock Series C Convertible Preferred Stock Statement [Line Items] State ment [ Line Item] Preferred stock, par value Preferred stock, face value Preferred stock, face value Preferred stock, authorized shares Preferred stock, issued shares Preferred stock, issued shares Preferred stock, outstanding shares Preferred stock, outstanding shares Preferred Stock, Shares Outstanding Preferred stock, liquidation preference Common stock, par value Common stock, Authorized Common Stock, Shares Authorized Common stock, Issued Common stock, outstanding Income Statement [Abstract] Product sales Product sales Product sales to Meineng Energy Engineering and development Engineering and development It represents engineering and development. Revenue, Net Total revenues Revenues Revenues Cost of product sales Cost of product sales Cost of product sales to Meineng Energy Cost of engineering and development Cost of engineering and development It represents cost of engineering and development. Advanced engineering and development Advanced engineering and development Selling, general, and administrative Selling, general, and administrative Depreciation and amortization Depreciation and amortization Costs and Expenses Total costs and expenses Loss from Operations Loss from operations Costs and Expenses [Abstract] Costs and expenses Equity in loss of investee company Equity in gain (loss) of investee company Equity in (gain) loss of investee company Interest income Interest income Interest Expense Interest expense Other Nonoperating Income (Expense) Other income Nonoperating Income (Expense) Total other income (expense) Loss before expense (benefit) for income taxes Loss before expense (benefit) for income taxes Expense (benefit) for income taxes Expense (benefit) for income taxes Provision for income taxes Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net loss Net Income (Loss) Attributable to Noncontrolling Interest Net loss attributable to noncontrolling interest Net loss attributable to noncontrolling interest Net Income (Loss) Attributable to Parent Net loss attributable to EnSync, Inc. Net loss Net Loss Preferred Stock Dividend Preferred stock dividend Net Loss Attributable to Common Shareholders Net loss attributable to common shareholders Net Loss per share - Basic and diluted Net loss per share Basic and diluted Weighted average shares-basic and diluted: Weighted average shares - basic and diluted Statement of Comprehensive Income [Abstract] Foreign exchange translation adjustments Foreign exchange translation adjustments Comprehensive loss Comprehensive loss Statement of Stockholders' Equity [Abstract] Equity Components [Axis] Shares, Outstanding Beginning Balance (Shares) Ending Balance (Shares) Net currency translation adjustment Net currency translation adjustment Issuance of common stock, net of costs and underwriting fees, Amount Issuance of common and preferred stock, net of costs and underwriting fees Issuance of stock Issuance of preferred stock, net of costs and underwriting fees, Amount Issuance of common stock, net of costs and underwriting fees, Shares Issuance of common and preferred stock, net of costs and underwriting fees (Shares) Issuance of shares, costs and underwriting fees, Shares Stock-based compensation, Amount Stock-based compensation Stock-based compensation, Shares Stock-based compensation (Shares) Contribution of capital from noncontrolling interest Contribution of capital from noncontrolling interest Contributions of capital from noncontrolling interest Conversion of preferred stock, Amount Conversion of preferred stock Conversion of preferred stock, Shares Conversion of preferred stock (Shares) Stock Issued During Period, Value, Stock Options Exercised Exercise of stock options Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Exercise of stock options (Shares) Number of Options exercised Statement of Cash Flows [Abstract] Cash flows from operating activities Cash flows from operating activities Adjustments to reconcile net loss to net cash used in operating activities: Adjustments to reconcile net loss to net cash provided by (used in) operating activities: Depreciation of property, plant and equipment Depreciation of property, plant and equipment Amortization of customer intangible assets Amortization of customer intangible assets Stock-based compensation, net Stock-based compensation, net Inventory Write-down Provision for inventory reserve Gain (Loss) on Disposition of Property Plant Equipment Gain on sale of property and equipment Gain on sale of property and equipment Interest and Dividend Income, Securities, Operating, Other Interest accreted on note receivable Business Combination, Bargain Purchase, Gain Recognized, Amount Gain on bargain purchase Increase (Decrease) in Accounts Receivable Accounts receivable Increase (Decrease) in Inventories Inventories Increase (Decrease) in Prepaid Expense and Other Assets Prepaids and other current assets Increase (Decrease) in Deferred Charges Deferred PPA project costs Increase (Decrease) in Other Operating Assets Deferred customer project costs Increase Decrease Project Assets Project assets It represents increase decrease project assets. Increase (Decrease) in Accounts Payable Accounts payable Increase (Decrease) in Accrued Liabilities Accrued expenses Increase (Decrease) in Customer Deposits Customer deposits Increase (Decrease) in Employee Related Liabilities Accrued compensation and benefits Increase (Decrease) in Deferred Revenue Deferred revenue Increase (Decrease) in Deferred Revenue Net Cash Provided by (Used in) Operating Activities Net cash provided by (used in) operating activities Cash flows from investing activities Cash flows from investing activities Business Combination, Consideration Transferred Cash paid for business combination Fair value of the consideration transferred Increase (Decrease) in Restricted Cash Change in restricted cash Payments to Acquire Property, Plant, and Equipment Expenditures for property and equipment Proceeds from Sale of Property, Plant, and Equipment Proceeds from sale of property and equipment Cash flows from financing activities Cash flows from financing activities Payments of Financing Costs Payment of financing costs Repayments of Long-term Debt Repayments of long-term debt Proceeds from Sale of Other Property, Plant, and Equipment Proceeds from equipment financing Repayments of Long-term Capital Lease Obligations Payments for finance leases Proceeds from issuance of preferred stock Proceeds from issuance of common stock Proceeds from issuance of common stock Proceeds from Stock Options Exercised Proceeds from the exercise of stock options Effect of exchange rate changes on cash and cash equivalents Effect of exchange rate changes on cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Net increase (decrease) in cash and cash equivalents Supplemental Cash Flow Information [Abstract] Supplemental disclosures of cash flow information: Right Of Use Asset Obtained In Exchange For New Finance Lease Right of use asset obtained in exchange for new finance lease Custom Element. Right of use asset obtained in exchange for new operating lease Right of use asset obtained in exchange for new operating lease It represents right of use asset obtained in exchange for new operating lease. Accounting Policies [Abstract] Summary Of Significant Accounting Policies Tables [Abstract] SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Notes to Financial Statements Notes to Financial Statements [Abstract] CHINA JOINT VENTURE Business Combination [Abstract] Business Combination Disclosure [Text Block] BUSINESS COMBINATIONS Organization, Consolidation and Presentation of Financial Statements [Abstract] MANAGEMENT'S PLANS AND FUTURE OPERATIONS Inventory Disclosure [Abstract] INVENTORIES Receivables [Abstract] NOTES RECEIVABLE Property, Plant and Equipment [Abstract] PROPERTY, PLANT & EQUIPMENT Goodwill and Intangible Assets Disclosure [Abstract] Debt Disclosure [Abstract] DEBT Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Disclosure Of Compensation Related Costs Share Based Payments Text Block EMPLOYEE AND DIRECTOR EQUITY INCENTIVE PLANS Earnings Per Share [Abstract] Earnings Per Share Text Block BASIC AND DILUTED NET LOSS PER SHARE Equity [Abstract] Stockholders' Equity Note Disclosure [Text Block] EQUITY Commitments and Contingencies Disclosure [Abstract] Commitments Disclosure Text Block COMMITMENTS Compensation and Retirement Disclosure [Abstract] Compensation And Employee Benefit Plans Text Block RETIREMENT PLANS Income Tax Disclosure [Abstract] INCOME TAXES Subsequent Events [Abstract] Description of Business Description of Business Comparability of Prior Year Financial Data, Policy [Policy Text Block] Interim Financial Data Basis of Presentation and Consolidation Basis of Presentation and Consolidation Use of Estimates Use of Estimates Fair Value of Financial Instruments Fair Value of Financial Instruments Cash and Cash Equivalents, Policy [Policy Text Block] Cash and Cash Equivalents Receivables, Policy [Policy Text Block] Accounts Receivable Inventory, Policy [Policy Text Block] Inventories Customer Intangible Asset Customer Intangible Asset Note Receivable Note Receivable Disclosure of accounting policy for note receivable. Deferred Charges, Policy [Policy Text Block] Deferred PPA Project Costs Deferred Customer Project Costs [Policy Text Block] Deferred Customer Project Costs Disclosure of accounting policy for deferred customer project costs. Project Assets [Policy Text Block] Project Assets Disclosure of accounting policy for project assets. Property, Plant and Equipment Property, Plant and Equipment Impairment of Long-Lived Assets Impairment of Long-Lived Assets Equity Method Investments, Policy [Policy Text Block] Investment in Investee Company Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block] Goodwill Accrued Expenses Accrued Expenses The entire disclosure for accrued expenses, including all tables. Warranty Obligations Warranty Obligations Asset Retirement Obligations Asset Retirement Obligations Revenue Recognition Revenue Recognition