Note 1 - Summary of Significant Accounting Policies (Details Textual) | 1 Months Ended | 12 Months Ended | |
Dec. 31, 2016USD ($)$ / sharesshares | Aug. 31, 2016USD ($)$ / sharesshares | Jul. 31, 2016USD ($)$ / sharesshares | Jun. 30, 2016USD ($)$ / sharesshares | May 31, 2016USD ($)$ / sharesshares | Apr. 30, 2016USD ($)$ / sharesshares | Mar. 31, 2016USD ($)$ / sharesshares | Oct. 31, 2015$ / sharesshares | Sep. 30, 2015USD ($)$ / sharesshares | Jul. 31, 2015USD ($)$ / sharesshares | May 31, 2015$ / sharesshares | Apr. 30, 2015$ / sharesshares | Dec. 31, 2016USD ($)$ / sharesshares | Dec. 31, 2015USD ($)$ / sharesshares | Dec. 31, 2014USD ($) |
Cash and Cash Equivalents, at Carrying Value | $ 851,000 | | | | | | | | | | | | $ 851,000 | $ 916,000 | $ 708,000 |
Working Capital Deficit | $ 20,700,000 | | | | | | | | | | | | 20,700,000 | | |
Net Cash Provided by (Used in) Operating Activities, Continuing Operations | | | | | | | | | | | | | $ (5,726,000) | (5,168,000) | |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number | shares | 1,464,089 | | | | | | | | | | | | 1,464,089 | | |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant | shares | 303,674 | | | | | | | | | | | | 303,674 | | |
Share-based Compensation | | | | | | | | | | | | | $ 697,000 | $ 1,397,000 | |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross | shares | | | | | | | | | | | | | 0 | 1,300,000 | |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | shares | | | | | | | | | | | | | 9,344,214 | 3,277,744 | |
Cash and Cash Equivalents Uninsured Amount | $ 676,000 | | | | | | | | | | | | $ 676,000 | | |
Stock Issued During Period, Shares, Warrants Exchanged | shares | | | | | | | | | | | 21,277,220 | | | | |
Class of Warrant or Right, Exchanged During Period, Exercise Price | $ / shares | | | | | | | | | | | $ 0.58 | | | | |
Gain (Loss) on Exchange of Warrants | | | | | | | | | | | | | 0 | $ (4,410,000) | |
Stock Issued During Period, Shares, New Issues | shares | | | | | | | | 200,000 | | | | | | | |
Proceeds from Issuance or Sale of Equity | | | | | | | | | | | | | | 2,463,000 | |
Proceeds from Related Party Debt | | | | | | | | | | | | | 5,505,000 | | |
Derivative, Gain (Loss) on Derivative, Net | | | | | | | | | | | | | 2,100,000 | 11,700,000 | |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings | | | | | | | | | | | | | $ 5,800,000 | $ 2,800,000 | |
Customer Concentration Risk [Member] | Sales Revenue, Net [Member] | | | | | | | | | | | | | | | |
Concentration Risk, Number of Customers | | | | | | | | | | | | | 2 | 3 | |
Customer Concentration Risk [Member] | Sales Revenue, Net [Member] | Two Customers [Member] | | | | | | | | | | | | | | | |
Concentration Risk, Percentage | | | | | | | | | | | | | 78.00% | | |
Customer Concentration Risk [Member] | Sales Revenue, Net [Member] | Three Customers [Member] | | | | | | | | | | | | | | | |
Concentration Risk, Percentage | | | | | | | | | | | | | | 82.00% | |
Customer Concentration Risk [Member] | Accounts Receivable [Member] | | | | | | | | | | | | | | | |
Concentration Risk, Number of Customers | | | | | | | | | | | | | 2 | 3 | |
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Two Customers [Member] | | | | | | | | | | | | | | | |
Concentration Risk, Percentage | | | | | | | | | | | | | 81.00% | | |
Customer Concentration Risk [Member] | Accounts Receivable [Member] | Three Customers [Member] | | | | | | | | | | | | | | | |
Concentration Risk, Percentage | | | | | | | | | | | | | | 90.00% | |
Acuitas [Member] | | | | | | | | | | | | | | | |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights | shares | | 2,028,029 | 431,818 | 363,636 | 306,818 | 200,000 | 450,000 | | | | | | | | |
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares | | $ 0.33 | $ 0.33 | $ 0.33 | $ 0.33 | $ 0.47 | $ 0.47 | | | | | | | | |
Class of Warrant or Right, Outstanding | shares | | | | | | 284,848 | 640,909 | | | | | | | | |
Proceeds from Issuance of Debt | | $ 225,000 | | | | | | | | | | | | | |
Warrant Term | | | 5 years | 5 years | 5 years | 5 years | 5 years | | | | | | | | |
Acuitas [Member] | Exchange of Warrants [Member] | | | | | | | | | | | | | | | |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights | shares | | 2,993,561 | | | | | | | | | | | | | |
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares | | $ 1.10 | | | | | | | | | | | | | |
Senior Promissory Note [Member] | Acuitas [Member] | Exchanged Senior Demand Notes [Member] | | | | | | | | | | | | | | | |
Debt Instrument, Face Amount | $ 2,800,000 | $ 2,800,000 | | | | | | | | | | | $ 2,800,000 | | |
Acuitas [Member] | March 2016 Promissory Note [Member] | | | | | | | | | | | | | | | |
Debt Instrument, Face Amount | | | | | | | $ 900,000 | | | | | | | | |
Debt Instrument, Interest Rate, Stated Percentage | | | | | | | 8.00% | | | | | | | | |
Proceeds from Issuance of Debt | | | | | | | $ 900,000 | | | | | | | | |
Debt Instrument, Term | | | | | | | 30 days | | | | | | | | |
Debt Instrument, Interest Rate, Stated Percentage After Maturity Date | | | | | | | 12.00% | | | | | | | | |
Acuitas [Member] | April 2016 Promissory Note [Member] | | | | | | | | | | | | | | | |
Debt Instrument, Face Amount | | | | | | $ 1,300,000 | | | | | | | | | |
Proceeds from Issuance of Debt | | | | | | $ 400,000 | | | | | | | | | |
Acuitas [Member] | May 2016 Promissory Note [Member] | | | | | | | | | | | | | | | |
Debt Instrument, Face Amount | | | | | $ 1,700,000 | | | | | | | | | | |
Proceeds from Issuance of Debt | | | | | $ 405,000 | | | | | | | | | | |
Acuitas [Member] | June 2016 Promissory Notes [Member] | | | | | | | | | | | | | | | |
Debt Instrument, Face Amount | | | | $ 2,200,000 | | | | | | | | | | | |
Proceeds from Issuance of Debt | | | | 480,000 | | | | | | | | | | | |
Short-term Debt | | | | $ 2,200,000 | | | | | | | | | | | |
Acuitas [Member] | July 2016 Promissory Note [Member] | | | | | | | | | | | | | | | |
Debt Instrument, Face Amount | | | $ 2,800,000 | | | | | | | | | | | | |
Proceeds from Issuance of Debt | | | 570,000 | | | | | | | | | | | | |
Short-term Debt | | | $ 2,800,000 | | | | | | | | | | | | |
Acuitas [Member] | | | | | | | | | | | | | | | |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights | shares | | 2,028,029 | | | | | | | | | | | | 935,008 | |
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares | | $ 0.33 | | | | | | | | | | | | $ 0.30 | |
Stock Issued During Period, Shares, New Issues | shares | | | | | | | | | | | | | | 6,953,334 | |
Proceeds from Issuance or Sale of Equity | | | | | | | | | $ 463,000 | | | | | $ 2,100,000 | |
Acuitas [Member] | Exchange of Warrants [Member] | | | | | | | | | | | | | | | |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights | shares | | 2,993,561 | | | | | | | | | | | | | |
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares | | $ 1.10 | | | | | | | | | | | | | |
Acuitas [Member] | July 2015 Convertible Debenture [Member] | | | | | | | | | | | | | | | |
Debt Instrument, Face Amount | | | | | | | | | | $ 3,550,000 | | | | | |
Debt Instrument, Interest Rate, Stated Percentage | | | | | | | | | | 12.00% | | | | | |
Debt Instrument, Convertible, Conversion Price | $ / shares | | | | | | | | $ 0.30 | | $ 1.90 | | | | | |
Acuitas [Member] | Senior Promissory Note [Member] | Exchanged Senior Demand Notes [Member] | | | | | | | | | | | | | | | |
Debt Instrument, Face Amount | | $ 2,800,000 | | | | | | | | | | | | | |
Director [Member] | | | | | | | | | | | | | | | |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights | shares | | 875,000 | | | | | | | | | | | | | |
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares | | $ 1.10 | | | | | | | | | | | | | |
Warrant Term | | 5 years | | | | | | | | | | | | | |
Proceeds from Related Party Debt | | $ 2,800,000 | | | | | | | | | | | | | |
Investors [Member] | December 2016 Warrants [Member] | | | | | | | | | | | | | | | |
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares | $ 1.10 | | | | | | | | | | | | $ 1.10 | | |
Warrant Term | 5 years | | | | | | | | | | | | | | |
Class of Warrant or Right, Percent of Securities Called by Warrants or Rights Upon Conversion | 40.00% | | | | | | | | | | | | 40.00% | | |
Class of Warrant or Right, Issued During Period | shares | 2,022,835 | | | | | | | | | | | | | | |
Investors [Member] | Debentures [Member] | | | | | | | | | | | | | | | |
Debt Instrument, Face Amount | $ 5,600,000 | | | | | | | | | | | | $ 5,600,000 | | |
Debt Instrument, Interest Rate, Stated Percentage | 8.00% | | | | | | | | | | | | 8.00% | | |
Investors [Member] | December 2016 Convertible Debenture [Member] | | | | | | | | | | | | | | | |
Debt Instrument, Face Amount | $ 2,800,000 | | | | | | | | | | | | $ 2,800,000 | | |
Debt Instrument, Interest Rate, Stated Percentage | 8.00% | | | | | | | | | | | | 8.00% | | |
Shamus [Member] | | | | | | | | | | | | | | | |
Stock Issued During Period, Shares, New Issues | shares | | | | | | | | | | | | | | 956,667 | |
Proceeds from Issuance or Sale of Equity | | | | | | | | | | | | | | $ 287,000 | |
Shamus [Member] | Shamus Warrants [Member] | | | | | | | | | | | | | | | |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights | shares | | 318,182 | | | | | | | | | | | | | |
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares | $ 0.85 | $ 1.10 | | | | | | | | | | | $ 0.85 | | |
Warrant Term | 5 years | 5 years | | | | | | | | | | | | | |
Class of Warrant or Right, Percent of Securities Called by Warrants or Rights Upon Conversion | 75.00% | | | | | | | | | | | | 75.00% | | |
Class of Warrant or Right, Issued During Period | shares | 264,706 | | | | | | | | | | | | | | |
Shamus [Member] | Senior Promissory Note [Member] | | | | | | | | | | | | | | | |
Debt Instrument, Face Amount | | $ 1,000,000 | | | | | | | | | | | | | |
Shamus [Member] | Debentures [Member] | | | | | | | | | | | | | | | |
Warrant Term | | | | | | | | | | | | | 5 years | | |
Shamus [Member] | December 2016 Convertible Debenture [Member] | | | | | | | | | | | | | | | |
Debt Instrument, Interest Rate, Stated Percentage | 8.00% | | | | | | | | | | | | 8.00% | | |
Proceeds from Issuance of Debt | $ 300,000 | | | | | | | | | | | | $ 300,000 | | |
Minimum [Member] | Furniture and Equipment [Member] | | | | | | | | | | | | | | | |
Property, Plant and Equipment, Useful Life | | | | | | | | | | | | | 2 years | | |
Minimum [Member] | Leasehold Improvements [Member] | | | | | | | | | | | | | | | |
Property, Plant and Equipment, Useful Life | | | | | | | | | | | | | 5 years | | |
Maximum [Member] | Furniture and Equipment [Member] | | | | | | | | | | | | | | | |
Property, Plant and Equipment, Useful Life | | | | | | | | | | | | | 7 years | | |
Maximum [Member] | Leasehold Improvements [Member] | | | | | | | | | | | | | | | |
Property, Plant and Equipment, Useful Life | | | | | | | | | | | | | 7 years | | |
Twenty Ten Stock Incentive Plan [Member] | | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized | shares | 1,825,000 | | | | | | | | | | | | 1,825,000 | | |
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period | | | | | | | | | | | | | 10 years | | |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number | shares | 1,464,089 | | | | | | | | | | | | 1,464,089 | | |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant | shares | 303,674 | | | | | | | | | | | | 303,674 | | |
Share-based Compensation | | | | | | | | | | | | | $ 697,000 | $ 1,400,000 | |
Twenty Ten Stock Incentive Plan [Member] | Minimum [Member] | | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | | | | | | | | | | | | | 3 years | | |
Twenty Ten Stock Incentive Plan [Member] | Maximum [Member] | | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | | | | | | | | | | | | | 5 years | | |
April 2015 Warrants [Member] | | | | | | | | | | | | | | | |
Warrants and Rights Outstanding Duration | | | | | | | | | | | | 5 years | | | |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights | shares | | | | | | | | | | | | 530,303 | | | |
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares | | | | | | | | | $ 0.30 | | | $ 2 | | | |
Class or Warrant or Right, Exercised During the Period | shares | | | 66,288 | | | | | | | | | | | | |
Class of Warrant or Right, Outstanding | shares | 464,015 | | | | | | | | | | | | 464,015 | | |
July 2015 Convertible Debenture [Member] | | | | | | | | | | | | | | | |
Debt Instrument, Convertible, Conversion Price | $ / shares | | | | | | | | | | $ 1.90 | | | | | |
July 2015 Convertible Debenture [Member] | Acuitas [Member] | | | | | | | | | | | | | | | |
Warrants and Rights Outstanding Duration | | | | | | | | | | 5 years | | | | | |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights | shares | | | | | | | | | | 935,008 | | | | | |
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares | | | | | | | | | | $ 1.90 | | | | | |
Debt Instrument, Face Amount | | | | | | | | | | $ 3,550,000 | | | | | |
Debt Instrument, Interest Rate, Stated Percentage | | | | | | | | | | 12.00% | | | | | |
Debt Instrument, Convertible, Conversion Price | $ / shares | | | | | | | | | | $ 1.90 | | | | | |
September Offering [Member] | | | | | | | | | | | | | | | |
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares | | | | | | | | | | $ 0.30 | | | | | |
September Offering [Member] | Acuitas [Member] | | | | | | | | | | | | | | | |
Debt Instrument, Convertible, Conversion Price | $ / shares | | | | | | | | | $ 0.30 | | | | | | |
Stock Issued During Period, Shares, New Issues | shares | | | | | | | | | 1,500,000 | | | | | | |