Note 7 - Warrants and Registration Rights Agreements (Details Textual) - USD ($) $ / shares in Units, $ in Thousands			1 Months Ended	6 Months Ended		12 Months Ended
	Feb. 06, 2016	Nov. 13, 2014	Apr. 30, 2015	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2016	Apr. 22, 2019	Mar. 31, 2019	Dec. 31, 2018	Nov. 05, 2018	Sep. 30, 2018	Jul. 31, 2018	Feb. 28, 2018	Feb. 06, 2018	Aug. 30, 2017	Mar. 31, 2017	Jul. 31, 2016	Apr. 05, 2016	Mar. 21, 2016	Jan. 28, 2016	Oct. 31, 2015	Jun. 30, 2015	Feb. 06, 2015	Feb. 04, 2015	Jan. 22, 2015
Class of Warrant or Right, Number of Securities Called by Warrants or Rights				20,140,731					20,140,731
Class of Warrant or Right, Exercise Price of Warrants or Rights				$ 0.15					$ 0.15
Class of Warrant or Right, Exercised During Period, Number of Securities Called by Warrants or Rights
Amortization of Debt Discount (Premium)				$ 1,797	$ 1,004
Related Party November 2018 Note Payable To Great Harbor LLC [Member]
Debt Instrument, Unamortized Discount, Total				684					$ 1,088	$ 1,214
Amortization of Debt Discount (Premium)				405
Golisano Holdings LLC [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights											4,542,219
Class of Warrant or Right, Exercise Price of Warrants or Rights																					$ 0.001
Common Stock, Capital Shares Reserved for Future Issuance																					12,697,977
Proceeds from Warrant Exercises	$ 1
Number of Warrants Expired	509,141
Number of Warrants Cancelled						6,857,143
July 2018 GH Warrant [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights												2,500,000
Class of Warrant or Right, Exercise Price of Warrants or Rights												$ 0.01
Common Stock, Capital Shares Reserved for Future Issuance												2,500,000
Debt Instrument, Unamortized Discount, Total												$ 1,479
Amortization of Debt Discount (Premium)				$ 493
November 2018 Great Harbor Warrant [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights										$ 0.01			$ 0.01
Common Stock, Capital Shares Reserved for Future Issuance										2,000,000			1,818,182
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right										2,000,000			1,818,182
January 2016 Golisano Warrant [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights																				$ 0.01
Common Stock, Capital Shares Reserved for Future Issuance																				1,136,363
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right																				1,136,363
March 2016 Golisano Warrant [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights																			$ 0.01
Common Stock, Capital Shares Reserved for Future Issuance																			3,181,816
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right																			3,181,816
Little Harbor July 2016 Warrant [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights																	2,168,178
Class of Warrant or Right, Exercise Price of Warrants or Rights																	$ 0.01
Common Stock, Capital Shares Reserved for Future Issuance																	2,168,178
Golisano LLC December 2016 Warrant [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights						$ 0.01
Common Stock, Capital Shares Reserved for Future Issuance						1,136,363
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right						1,136,363
Golisano LLC March 2017 Warrant [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights																$ 0.01
Common Stock, Capital Shares Reserved for Future Issuance																1,484,847
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right																1,484,847
Golisano Warrants [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights														$ 0.01			$ 0.01
Common Stock, Capital Shares Reserved for Future Issuance														1,818,182			2,168,178
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right														1,818,182			2,168,178
January 2016 GH Warrant [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights																				$ 0.01
Common Stock, Capital Shares Reserved for Future Issuance																				1,136,363
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right																				1,136,363
March 2016 GH Warrant [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights																			$ 0.01
Common Stock, Capital Shares Reserved for Future Issuance																			3,181,816
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right																			3,181,816
December 2016 GH Warrant [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights						$ 0.01
Common Stock, Capital Shares Reserved for Future Issuance						1,136,363
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right						1,136,363
August 2017 GH Warrant [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights															$ 0.01
Common Stock, Capital Shares Reserved for Future Issuance															1,363,636
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right															1,363,636
JL Warrants [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights																		$ 0.01
Common Stock, Capital Shares Reserved for Future Issuance																		227,273
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right																		227,273
Midcap Funding X Trust [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights							500,000							500,000											500,000
Class of Warrant or Right, Exercise Price of Warrants or Rights							$ 0.76							$ 0.76											$ 0.76
Common Stock, Capital Shares Reserved for Future Issuance							500,000							500,000
Penta Mezzanine SBIC Fund I, L.P. [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights								4,960,740															4,960,740
Class of Warrant or Right, Exercise Price of Warrants or Rights																							$ 0.01
Proceeds from Notes Payable, Total		$ 8,000
Class of Warrants or Rights, Subject to Repurchase								4,960,740
Class of Warrant or Right, Minimum Repurchase Price, Under Agreement								$ 3,750
Penta Mezzanine SBIC Fund I, L.P. [Member] | Warrants Issued on June 30, 2015 [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights																						$ 0.01
Class of Warrant or Right, Cancelled, Number of Securities Called by Warrants or Rights																						807,018
Penta Mezzanine SBIC Fund I, L.P. [Member] | Warrants Issued on January 22, 2015[Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights																									869,618
Class of Warrant or Right, Exercise Price of Warrants or Rights																									$ 1
JL-BBNC Mezz Utah, LLC [Member]
Class of Warrant or Right, Exercised During Period, Number of Securities Called by Warrants or Rights						1,187,995
Proceeds from Warrant Exercises						$ 1
JL-BBNC Mezz Utah, LLC [Member] | Warrants Issued on June 30, 2015 [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights																						403,509
Class of Warrant or Right, Exercise Price of Warrants or Rights																						$ 0.01
JL-BBNC Mezz Utah, LLC [Member] | Warrants Issued on January 22, 2015[Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights																									2,329,400
Class of Warrant or Right, Exercise Price of Warrants or Rights																									$ 0.01
JL-BBNC Mezz Utah, LLC [Member] | Warrants Issued on February 4, 2015 [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights																								434,809
Class of Warrant or Right, Exercise Price of Warrants or Rights																								$ 1
JL Properties, Inc. [Member]
Deposits Assets			$ 1,000
JL Properties, Inc. [Member] | First Warrant [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights			465,880
Class of Warrant or Right, Exercise Price of Warrants or Rights			$ 0.01
Adjustments on Warrants Trigger Event, Minimum Adjusted EBITDA			$ 19,250
JL Properties, Inc. [Member] | Second Warrant [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights			86,962
Class of Warrant or Right, Exercise Price of Warrants or Rights			$ 1