Document And Entity Information [Abstract] Document And Entity Information [Abstract] Document and entity information. Statement [Table] Statement [Table] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Common Class A [Member] Class A common stock Class A common stock Class A Common Stock Common Class B [Member] Class B common stock Class B common stock Statement [Line Items] Statement [Line Items] Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Trading Symbol Trading Symbol Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Document Type Document Type Document Period End Date Document Period End Date Amendment Flag Amendment Flag Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Assets [Abstract] ASSETS Assets, Current [Abstract] Current assets: Cash and Cash Equivalents, at Carrying Value Cash Cash at beginning of year Cash at end of year Accounts Receivable, Net, Current Accounts receivable, net Inventory, Net Inventory, net Deferred Costs, Current, Total Deferred costs on uncompleted contracts Other Assets, Current Other current assets Disposal Group, Including Discontinued Operation, Assets, Current Current assets of discontinued operations Assets, Current Total current assets Property, Plant and Equipment, Net Property and equipment, net Total property and equipment, net Indefinite-Lived Intangible Assets (Excluding Goodwill) POWERHOUSE license Goodwill Goodwill Capital Leases, Lessor Balance Sheet, Net Investment in Sales Type Leases, Noncurrent Net investment in sales-type leases and other assets Disposal Group, Including Discontinued Operation, Assets, Noncurrent Noncurrent assets of discontinued operations Total noncurrent assets of discontinued operations Assets Total assets Total assets Liabilities and Equity [Abstract] LIABILITIES AND SHAREHOLDERS' EQUITY Liabilities, Current [Abstract] Current liabilities: Convertible Debt, Current Convertible debt, net of deferred costs and discount of $1,976 Convertible debt, net of deferred cost Accounts Payable, Current Accounts payable Accrued Liabilities, Current Accrued liabilities Accrued expense Deferred Credits and Other Liabilities, Current Deferred revenue and other current liabilities Disposal Group, Including Discontinued Operation, Liabilities, Current Current liabilities of discontinued operations Total current liabilities of discontinued operations Liabilities, Current Total current liabilities Other Liabilities, Noncurrent Other liabilities Derivative Liability, Noncurrent Common stock warrant liability Derivative liabilities Value of warrants, Beginning balance Value of warrants, Ending balance Disposal Group, Including Discontinued Operation, Liabilities, Noncurrent Non-current liabilities of discontinued operations Liabilities Total liabilities Commitments and Contingencies Commitments and contingencies (Note 5) Stockholders' Equity Attributable to Parent [Abstract] Shareholders' equity: Preferred Stock, Value, Issued Preferred stock, par value $.0001 per share; 50,000,000 shares authorized; no shares issued and outstanding Common Stock, Value, Issued Common stock value Common stock, value Balance Balance Additional Paid in Capital, Common Stock Additional paid-in capital Additional capital Proxy Contest Consideration Proxy contest consideration Represents proxy contest consideration. Retained Earnings (Accumulated Deficit) Accumulated deficit Stockholders' Equity Attributable to Parent Total shareholders' equity Balances Balances Liabilities and Equity Total liabilities and shareholders' equity Preferred Stock, Par or Stated Value Per Share Preferred stock, par value (in dollars per share) Convertible preferred stock, stated value (in dollars per share) Preferred Stock, Shares Authorized Preferred stock, shares authorized Preferred Stock, Shares Issued Preferred stock, shares issued Preferred Stock, Shares Outstanding Preferred stock, shares outstanding Common Stock, Par or Stated Value Per Share Common stock, par value (in dollars per share) Common Stock, Shares Authorized Common stock, shares authorized Common Stock, Shares, Issued Common stock, shares issued Issuance of common stock Balance (in shares) Balance (in shares) Common Stock, Shares, Outstanding Common stock, shares outstanding Income Statement [Abstract] Statement of Operations: Income Statement [Abstract] Sales Revenue from Energy Commodities and Services [Abstract] Contract revenue: Sales Revenue from Energy Commodities and Services, Total Sale and installation of solar energy systems Sales Revenue, Energy Services Service Operating Leases, Income Statement, Lease Revenue, Total Leasing, net Contract Expenses [Abstract] Contract expenses: Cost of Goods and Services, Energy Commodities and Services Installation of solar energy systems Cost of Services, Energy Services Service Business Development Customer acquisition Contract Loss Contract loss Contract loss Represents contract loss incurred during the reporting period. Contract loss Operating Expenses Operating expense Total expenses Legal Fees Legal expenses related to subpoena Litigation Operating Income (Loss) Income (loss) from operations Operating Loss Operating loss Derivative, Gain (Loss) on Derivative, Net Derivative and other Debt Accretion Expense And Loss On Extinguishment Loss on debt extinguishment Debt accretion expense and loss on extinguishment Debt extinguishment Represents Debt accretion expense and loss on extinguishment of debt. Debt accretion expense and loss on extinguishment Income (Loss) from Continuing Operations Attributable to Parent Loss from continuing operations, net of tax Loss from continuing operations Loss from continuing operations, net of tax Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent, Total Gain from discontinued operations, net of tax (Loss) Income from discontinued operations, net of tax (Loss)/gain on discontinued operations Income (loss) from discontinued operations Gain (loss) from discontinued operations Net loss Net Loss Net loss Numerator for basic and diluted net loss per share Net loss Numerator for basic and diluted net loss per share Earnings Per Share, Basic and Diluted [Abstract] Net loss per share - basic and diluted: Net loss per share - basic and diluted: Income (Loss) from Continuing Operations, Per Basic and Diluted Share From continuing operations (in dollars per share) Loss from continuing operations (in dollars per share) Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic and Diluted Share From discontinued operations Loss from discontinued operations (in dollars per share) Earnings Per Share, Basic and Diluted Net loss per share - basic and diluted (in dollars per share) Net loss per share - basic and diluted (in dollars per share) Net loss per share - basic and diluted (in dollars per share) Weighted Average Number of Shares Outstanding, Diluted [Abstract] Denominator: Weighted-average shares outstanding: Weighted Average Number of Shares Outstanding, Basic and Diluted Basic and Diluted (in shares) Statement of Stockholders' Equity [Abstract] Statement of Changes in Shareholders' Equity Statement of Stockholders' Equity [Abstract] Additional Paid-in Capital [Member] Additional Paid-in Capital [Member] Additional Paid - in Capital Retained Earnings [Member] Accumulated Deficit Increase (Decrease) in Stockholders' Equity [Roll Forward] Adjustments To Additional Paid In Capital Proceeds From Common Stock Offering And Warrant Exercises Proceeds from common stock offering and warrant exercises, net of costs Amount of increase in additional paid in capital (APIC) resulting from proceeds from common stock offering and warrant exercises, net of costs. Adjustments To Additional Paid In Capital Common Stock Offering And Warrant Exercises Proceeds from common stock offering and warrant exercises, net of costs (in shares) Stock issued in exchange for Class A common stock Number of shares in additional paid in capital (APIC) resulting from proceeds from common stock offering and warrant exercises, net of costs. Adjustments To Common Stock Issued To Settle Proxy Contest Common stock issued to settle proxy contest (in shares) Number of common share issued for settle proxy contest. Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Net Cash Provided by (Used in) Operating Activities [Abstract] Operating activities: Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Income from discontinued operations Gain from discontinued operations, net of tax Income from discontinued operations, net of tax (Loss) Income from discontinued operations Income from discontinued operations, net of tax Gain (loss) from discontinued operations Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net loss to net cash used in operating activities - continuing operations: Depreciation Depreciation Share-based Compensation Share-based compensation expense Share based compensation Share-based compensation Change In Fair Value Of Derivative Liabilities And Loss On Debt Extinguishment Change in fair value of derivative liabilities and loss on debt extinguishment Represents change in fair value of derivative liabilities and loss on debt extinguishment. Change in fair value of derivative liabilities and loss on debt extinguishment Inventory Write-down Inventory obsolescence Bad debt expense Increase (Decrease) in Operating Capital [Abstract] Changes in operating assets and liabilities: Increase (Decrease) in Accounts Receivable Accounts receivable, net Increase (Decrease) in Cost in Excess of Billing on Uncompleted Contract Costs in excess of billings on uncompleted contracts Increase (Decrease) in Inventories Inventory Increase (Decrease) in Deferred Charges Deferred costs on uncompleted contracts Increase Decrease In Net Investment In Sales Type Leases And Other Current Assets Increase decrease in net investment in sales-type leases and other current assets. Net investment in sales-type leases and other current assets Increase (Decrease) in Other Noncurrent Assets Other non-current assets Other non-current assets Increase (Decrease) in Accounts Payable Accounts payable Reduction in vendor accounts payable Increase (Decrease) in Accrued Liabilities Accrued liabilities Increase (Decrease) in Deferred Revenue and Other Current Liabilities Deferred revenue and other current liabilities Increase (decrease) in deferred revenue and other current liabilities. Increase (Decrease) in Other Operating Liabilities Other liabilities Net Cash Provided by (Used in) Operating Activities, Continuing Operations Net cash used in operating activities - continuing operations Cash Provided by (Used in) Operating Activities, Discontinued Operations Net cash provided by (used in) operating activities - discontinued operations Net cash used in operating activities Increase in net cash used in operating activities Net cash used in operating activities Net Cash Provided by (Used in) Investing Activities [Abstract] Investing activities: Payments to Acquire Intangible Assets Payments related to POWERHOUSE license Payments related to POWERHOUSE license Payments to Acquire Property, Plant, and Equipment Purchases of property and equipment Proceeds from Sale of Property, Plant, and Equipment Proceeds from sale of property and equipment Net Cash Provided by (Used in) Investing Activities Net cash used in investing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Financing activities: Proceeds from Warrant Exercises Proceeds from warrant exercises, net of costs Proceed from warrant exercise Restricted Cash Released Upon Conversion Of Debt Restricted cash released upon conversion of debt It show the amount of restricted cash released upon conversion of debt. Proceeds from the issuance of warrants, net of costs Proceeds from Issuance of Common Stock Proceeds from issuance of common stock Proceeds from the issuance of common stock, net of costs Repayments of Lines of Credit Principal payments on revolving line of credit Principal payments on revolving line of credit Net Cash Provided by (Used in) Financing Activities, Total Net cash provided by financing activities Cash and Cash Equivalents, Period Increase (Decrease) Net proceeds received from preferred stock offering Net proceeds received from convertible notes offering Net (decrease) increase in cash Noncash Investing and Financing Items [Abstract] Non-cash items Convertible notes interest paid with common stock Represents amount of Convertible notes interest paid with common stock. Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Principles of Consolidation, Organization and Nature of Operations Organization, Nature of Operations, and Principles of Consolidation Accounting Policies [Abstract] Accounting Policies [Abstract] Purchase Accounting Significant Accounting Policies [Text Block] Significant Accounting Policies Revenue Recognition and Deferred Revenue [Abstract] Revenue from Contract with Customer [Text Block] Revenue Property, Plant and Equipment [Abstract] Property, Plant and Equipment Disclosure [Text Block] Property and Equipment Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Text Block] Commitments and Contingencies Equity [Abstract] Equity [Abstract] Stockholders' Equity Note Disclosure [Text Block] Shareholders' Equity Debt Disclosure [Abstract] Debt Disclosure [Text Block] Convertible Debt Fair Value Disclosures [Abstract] Fair Value Disclosures [Text Block] Fair Value Measurements Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Share-Based Compensation Earnings Per Share [Abstract] Earnings Per Share [Text Block] Net Income (Loss) Per Share Segment Reporting [Abstract] Segment Reporting [Abstract] Segment Reporting Disclosure [Text Block] Segment Information Discontinued Operations and Disposal Groups [Abstract] Discontinued Operations and Disposal Groups [Abstract] Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Discontinued Operations Subsequent Events [Abstract] Subsequent Events [Text Block] Subsequent Events Principles Of Consolidation And Basis Of Presentation [Policy Text Block] Principles of Consolidation Disclosure of accounting policy for principle of consolidation and basis of presentation explaining the annual financial statement information. Reclassification, Policy [Policy Text Block] Reclassification of Prior Year Presentation New Accounting Pronouncements, Policy [Policy Text Block] Recently Issued Accounting Standards Property, Plant and Equipment [Table Text Block] Schedule of property and equipment stated at lower of cost or estimated fair value Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Schedule of future minimum lease payments Schedule of Stockholders Equity [Table Text Block] Schedule of shares of Class A common stock reserved for future issuance Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Schedule of fair value of assets and liabilities measured on recurring basis Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Schedule of reconciliation of common stock warrant liability measured at fair value on recurring basis Schedule of Weighted Average Number of Shares [Table Text Block] Schedule of basic and diluted weighted average shares outstanding Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block] Schedule of reconciliation of reportable segments' income (loss) from operations Reconciliation of Assets from Segment to Consolidated [Table Text Block] Schedule of reconciliation of reportable segments' assets to the company's consolidated total assets Schedule Of Discontinued Operations Income Statement Table [Text Block] Schedule of reconciliation of major line items constituting pretax loss of discontinued operations to the after-tax loss of discontinued operations presented in condensed consolidated statements of operations Schedule Of Discontinued Operations Income Statement Table [Text Block] Schedule Of Discontinued Operations Balance Sheet Table [Text Block] Schedule of reconciliation of the carrying amounts of major classes of assets and liabilities of the discontinued operations to the total assets and liabilities of the discontinued operations presented separately in the condensed consolidated balance sheets Schedule Of Discontinued Operations Balance Sheet Table [Text Block] Principles Of Consolidation, Organization And Nature Of Operations [Table] Discloses pertinent information about principles of consolidation, organization and nature of operations. Type of Arrangement and Non-arrangement Transactions [Axis] Arrangements and Non-arrangement Transactions [Domain] Powerhouse License Agreement [Member] Powerhouse License Agreement It represents Powerhouse License Agreement. Securities Purchase Agreement [Member] Securities Purchase Agreement Cooperation Agreement Securities Purchase Agreement. Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event [Member] Subsequent events Sale of Stock [Axis] Sale of Stock [Domain] Private Placement [Member] Private Placement Short-term Debt, Type [Axis] Short-term Debt, Type [Axis] Short-term Debt, Type [Domain] Short-term Debt, Type [Domain] Convertible Debt [Member] Senior Secured Convertible Notes 2018 Notes Related Party [Axis] Related Party [Domain] Investor [Member] Unaffiliated institutional investors Class of Warrant or Right [Axis] Class of Warrant or Right [Axis] Class of Warrant or Right [Domain] Class of Warrant or Right [Domain] Series Q Warrants [Member] Series Q Warrants Series Q Warrants. Principles Of Consolidation, Organization And Nature Of Operations [Line Items] Principles Of Consolidation, Organization And Nature Of Operations [Line Items] Detail information of principles of consolidation, organization and nature of operations. Debt Instrument, Face Amount Principal amount of notes issued Gross proceeds from offerings Net offering cost Net proceeds of initial closings Amount of net proceeds Proceeds From Sale Of Notes At Closing Of Offering Proceeds from sale of notes at closing of offering The cash inflow from proceeds from sale of notes at closing of offering. Proceeds from Sale and Collection of Notes Receivable Aggregate amount of investor notes receivable Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Leasehold Improvements [Member] Buildings and leasehold improvements Furniture and Fixtures [Member] Furniture, fixtures and equipment Software and Software Development Costs [Member] Website development Software Vehicles [Member] Vehicles and machinery Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Property, Plant and Equipment, Gross Total property and equipment Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Accumulated depreciation and amortization Operating Leases, Future Minimum Payments Due, Next Twelve Months 2018 Operating Leases, Future Minimum Payments, Due in Two Years 2019 Operating Leases, Future Minimum Payments, Due in Three Years 2020 Operating Leases, Future Minimum Payments, Due in Four Years 2021 Operating Leases, Future Minimum Payments, Due Thereafter 2022 and thereafter Operating Leases, Future Minimum Payments Due Total minimum lease payments Commitments and Contingencies Disclosure [Table] Commitments and Contingencies Disclosure [Table] Commitments and Contingencies Disclosure [Table] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum [Member] Minimum Maximum [Member] Maximum Cooperation Agreement [Member] Cooperation Agreement Information of Cooperation Agreement. Legal Entity [Axis] Entity [Domain] Iroquois Master Fund Ltd [Member] Iroquois Master Fund LTD Information of Iroquois Master Fund LTD. Iroquois Capital Investment Group Llc [Member] Iroquois Capital Investment Group LLC Information of Iroquois Capital Investment Group LLC. Commitments and Contingencies Disclosure [Line Items] Commitments and Contingencies Disclosure [Line Items] Commitments and Contingencies Disclosure [Line Items] Lessor Leasing Arrangements, Operating Leases, Renewal Term Operating leases, renewal options Lessor Leasing Arrangements, Operating Leases, Term of Contract Operating lease, lease term Operating Leases, Rent Expense, Net Rent expense Office and warehouse rent expense Operating Lease, Expense Automobile lease expense License Costs License fee License Fee Due With Effective Date Of Agreement License fee due with the effective date of agreement Represents license fee due with effective date of agreement . License Fee Due With In Thirty Days After Receiving Certification License fee due with in 30 days after receiving UL Certification Represents license fee due with in thirty days after receiving Certification. Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures, Total Number of unregistered and restricted shares Loss Contingency, Damages Paid, Value Liquidated damages under the terms of the project contract Escrow Deposit Disbursements Related to Property Acquisition Release of amount held in escrow Loss Contingency Accrual, Period Increase (Decrease) Increase in liability for settlement with all parties Schedule Of Stockholders Equity [Table] Schedule Of Stockholders Equity [Table] Schedule Of Stockholders Equity [Table] Award Type [Axis] Equity Award [Domain] Equity Award [Domain] Stock Options Under Incentive Plans [Member] Stock options and grants outstanding under incentive plans Represents the stock options issued under incentive plans. Warrant [Member] Common stock warrants Warrant Common stock warrants outstanding Investment Type [Axis] Investment Type [Axis] Investments [Domain] Investments [Domain] Derivative [Member] Derivative liability Equity Securities [Member] Equity security Schedule Of Stockholders Equity [Line Items] Schedule Of Stockholders' Equity [Line Items] Schedule Of Stockholders' Equity [Line Items] Common Stock, Capital Shares Reserved for Future Issuance Total shares reserved for future issuance Common stock shares reserved Shareholders Equity [Table] Represents tabular information of shareholders' equity. Series P Warrant [Member] Series P Warrant Represents Series P Warrant Shares. Series O Warrant [Member] Series O Warrant Represents Series O Warrant Shares. Shareholders Equity [Line Items] Line items represent reporting concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Sale of Stock, Number of Shares Issued in Transaction Number of Class A common stock issue and sold Class of Warrant or Right, Number of Securities Called by Warrants or Rights Shares issued upon exercise of warrants Number of shares called by warrants Shares of common stock to purchase by warrant issued Sale of Stock, Price Per Share Class A common stock per share Shares Issued, Price Per Share Stock issued, price per share (in dollars per share) Purchase price of units per share (in dollars per share) Common stock underlying per share Proceeds from Issuance of Private Placement Amount of gross proceeds Proceeds from February Offering Common Stock Issued Upon Exercise Of Warrants Common stock issued upon exercise of warrants Common stock issued upon exercise of warrants. Schedule of Long-term Debt Instruments [Table] Series A 2018 Convertible Note Offering [Member] Series A 2018 convertible note offering Represents information of Series A 2018 Convertible Note Offering. Series B 2018 Convertible Note Offering [Member] Series B 2018 convertible note offering Represents information of Series B 2018 Convertible Note Offering. Debt Instrument [Line Items] Number Of Unaffiliated Institutional Investors Number of unaffiliated institutional investors Represents the number of unaffiliated institutional investors. Proceeds From Original Issue Discount Proceeds from original issue discount ("OID") The cash inflow from the proceeds from original issue discount Proceeds from Convertible Debt Proceeds from convertible debt, net of costs and restricted cash Proceeds from convertible debt, net of costs and restricted cash Proceeds from convertible debt Proceeds from Secured Notes Payable Proceeds from promissory notes secured by cash and securities held in escrow Repayments of Convertible Debt Additional OID Amount payable Debt Instrument, Interest Rate, Stated Percentage Percentage of interest rates Debt Instrument, Convertible, Conversion Price Initial fixed conversion price Initial conversion price Debt Instrument, Convertible, Conversion Price Before Increase Conversion price of convertible debt before increase Represents the conversion price of convertible debt instrument before increase. Debt Instrument, Convertible, Increased Conversion Price Increased conversion price of convertible debt in amendments Represents the increase conversion price of convertible debt. Debt Instrument, Convertible, Threshold Consecutive Trading Days Threshold consecutive trading days Debt Instrument, Convertible, Stock Price Trigger Stock price trigger, per share amount Threshold Percentage Of Stock Subject To Volume Weighted Average Price Threshold percentage of stock subject to volume weighted average price Threshold percentage of stock subject to volume weighted average price. Debt Instrument, Convertible, Threshold Trading Days Threshold number of specified trading days Percentage Of Premium On Alternate Conversion Percentage of premium on alternate conversion This element represents percentage of premium on alternate conversion. Available Cash Requirement On Quarterly Basis Available cash requirement on quarterly basis This elements represents amount of available cash requirement on quarterly basis. Number Of Convertible Notes Issued Number of convertible notes issued Represents the number of convertible notes issued. Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurements, Recurring [Member] Recurring basis Measurement Basis [Axis] Fair Value Measurement [Domain] Estimate of Fair Value Measurement [Member] Total Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Fair Value, Inputs, Level 1 [Member] Level 1 Quoted Prices in Active Markets for Identical Items (Level 1) Fair Value, Inputs, Level 2 [Member] Level 2 Significant Other Observable Inputs (Level 2) Fair Value, Inputs, Level 3 [Member] Significant Unobservable Inputs (Level 3) Level 3 Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Liability Class [Axis] Liability Class [Axis] Fair Value by Liability Class [Domain] Fair Value by Liability Class [Domain] Common Stock Warrants [Member] Common stock warrant liability Common Stock Warrants [Member] Embedded Derivative Liability [Member] Embedded derivative liability Represents information regarding liability. Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value Fair value of derivative liabilities at December 31, 2017 Fair value of derivative liabilities at March 31, 2018 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Period Increase (Decrease) Change in the fair value of derivative liabilities, net Change in the fair value of derivative liabilities, net Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements Adjustment for conversions of Notes Adjustment for conversions of Notes Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] Long Term Incentive Plan Twenty Zero Eight [Member] 2008 Long-Term Incentive Plan Long Term Incentive Plan Twenty Zero Eight [Member] Vesting [Axis] Vesting [Domain] Share-based Compensation Award, Tranche Two [Member] 50 months beginning with the first day of the eleventh month after date of grant Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period Forfeited or expired Stock options cancelled Forfeited or expired Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Stock options granted Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage Option vesting percentage Minimum vesting percentage of equity awards issued Weighted Average Number of Shares Outstanding, Basic Basic (in shares) Weighted average shares for basic net loss per share (in shares) Incremental Weighted Average Shares Attributable to Dilutive Effect [Abstract] Effect of dilutive securities: Effect of dilutive securities: Weighted Average Number Diluted Shares Outstanding Adjustment Weighted average of common stock, stock options and warrants (in shares) Weighted average of common stock, stock options and warrants Weighted Average Number of Shares Outstanding, Diluted Denominators for diluted net loss per share (in shares) Diluted (in shares) Denominators for diluted net loss per share Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Antidilutive securities excluded from computation of earnings per share amount Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Segments [Axis] Segments [Axis] Segments [Domain] Segments [Domain] Residential [Member] Residential Residential [Member] Sunetric Segment [Member] Sunetric Sunetric Sunetric Segment [Member] Power House [Member] POWERHOUSE Represents POWERHOUSE. Corporate and Other [Member] Other Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Revenues Net revenue Consolidated contract revenue Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Abstract] Reconciliation of consolidated loss from operations to consolidated net loss: Reconciliation of Assets from Segment to Consolidated [Table] Reconciliation of Assets from Segment to Consolidated [Table] Operating Activities [Axis] Operating Activities [Axis] Operating Activities [Domain] Operating Activities [Domain] Continuing Operations [Member] Continuing Operations Discontinued Operations [Member] Discontinued Operations Commercial [Member] Commercial Segment Commercial [Member] Segment Reporting, Asset Reconciling Item [Line Items] Segment Reporting, Asset Reconciling Item [Line Items] Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract] Major line items constituting pretax loss of discontinued operations: Disposal Group, Including Discontinued Operation, Revenue Contract revenue Disposal Group Including Discontinued Operation Contract Income Expense Contract expense (income) Represents the amount of contract expenses in discontinued operations. Contract expense (income) Disposal Group, Including Discontinued Operation, Operating Expense Operating and other expense Operating and other expense Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, before Income Tax Pretax income (loss) from discontinued operations Carrying Amounts Of Major Classes Of Assets Included As Part Of Discontinued Operations [Abstract] Carrying amounts of major classes of assets included as part of discontinued operations: Carrying Amounts Of Major Classes Of Assets Included As Part Of Discontinued Operations [Abstract] Disposal Group, Including Discontinued Operation, Assets, Current [Abstract] Current assets: Disposal Group, Including Discontinued Operation, Accounts, Notes and Loans Receivable, Net Accounts receivable, net Disposal Group Including Discontinued Operation Costs In Excess Of Billings On Uncompleted Contract Current Costs in excess of billings on uncompleted contracts Disposal group including discontinued operation costs in excess of billings on uncompleted contract current. Disposal Group, Including Discontinued Operation, Inventory, Current Inventory, net Disposal Group, Including Discontinued Operation, Other Assets, Current Other current assets Major Classes Of Current Assets Of Discontinued Operations Total major classes of current assets of the discontinued operations Major classes of current assets of discontinued operations. Disposal Group, Including Discontinued Operation, Assets, Noncurrent [Abstract] Noncurrent assets: Disposal Group, Including Discontinued Operation, Other Assets, Noncurrent Other noncurrent assets Disposal Group, Including Discontinued Operation, Assets Catalogue business, book value Retail and catalogue business, book value Total assets of the discontinued operations in the balance sheet Carrying Amounts of Major Classes of Liabilities Included as Part of Discontinued Operations [Abstract] Carrying amounts of major classes of liabilities included as part of discontinued operations: Carrying Amounts of Major Classes of Liabilities Included as Part of Discontinued Operations [Abstract] Disposal Group, Including Discontinued Operation, Liabilities, Current [Abstract] Current liabilities: Disposal Group, Including Discontinued Operation, Accounts Payable, Current Accounts payable Disposal Group, Including Discontinued Operation, Accrued Liabilities, Current Accrued liabilities Disposal Group Including Discontinued Operation Deferred Revenue And Other Liabilities Current Deferred revenue and other current liabilities Disposal Group Including Discontinued Operation Deferred Revenue And Other Liabilities Current Disposal Group, Including Discontinued Operation, Liabilities, Noncurrent [Abstract] Noncurrent liabilities: Disposal Group, Including Discontinued Operation, Other Liabilities, Noncurrent Other liabilities Major Classes Of Noncurrent Liabilities Of Discontinued Operations Total major classes of noncurrent liabilities of the discontinued operations Total major classes of noncurrent liabilities of the discontinued operations Major Classes Of Noncurrent Liabilities Of Discontinued Operations Disposal Group, Including Discontinued Operation, Liabilities Total liabilities of the discontinued operations in the balance sheet Subsequent Event [Table] Subsequent Event [Line Items] Warrants and Rights Outstanding Warrant Outstanding Number of Operating Segments Number of operating segment Nonoperating Gains (Losses) Derivative and Other Class of Warrant or Right, Exercise Price of Warrants or Rights Initial exercise price of warrants exercisable Class Of Warrant Or Right Period Of Warrants Or Rights Exercisable Period for which warrant exercisable Class of Warrant or Right, Period Of Warrants or Rights Exercisable. Exercise Price Of Warrants Or Rights Payable At Closing Exercise price of warrant paid at closing Class of Warrant or Right, Exercise Price of Warrants or Rights payable at closing. Exercise Price Of Warrants Or Rights Payable Upon Exercise Exercise price of warrants payable upon exercise Exercise Price Of Warrants Or Rights Payable Upon Exercise. Debt Conversion, Converted Instrument, Amount Aggregate principal amount of Notes converted