Note 6 - Commitments and Contingencies (Details Textual) - USD ($)				1 Months Ended			3 Months Ended	12 Months Ended
	Jun. 16, 2015	Jun. 03, 2015	Oct. 31, 2014	May. 31, 2016	Mar. 31, 2016	Oct. 31, 2015	Mar. 31, 2016	Dec. 31, 2015
Former Owners of RedPath [Member]
Business Combination, Indemnification Assets, Amount as of Acquisition Date			$ 2,500,000
RedPath Integrated Pathology, Inc [Member]
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares						500,000
Business Combination, Indemnification Assets, Amount as of Acquisition Date					$ 1,500,000		$ 1,500,000
Business Combination, Indemnification Assets, Amount as of Acquisition Date, Current					500,000		500,000
Business Combination, Indemnification Assets, Amount as of Acquisition Date, Noncurrent					1,000,000		1,000,000
Other Accrued Expenses [Member]
Regulatory Liabilities					800,000		800,000
Other Noncurrent Liabilities [Member]
Regulatory Liabilities					1,000,000		1,000,000
Subsequent Event [Member]
Litigation Settlement, Amount				$ 250,000
Continuing Operations [Member]
Severance Costs							500,000
Letters of Credit Outstanding, Amount					$ 500,000		$ 500,000
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares	500,000		500,000		500,000
Common Stock, Par or Stated Value Per Share			$ 0.01		$ 0.01		$ 0.01	$ 0.01
Adjustments to Additional Paid in Capital, Other	$ (6,100,000)				$ (6,800,000)
Stock Issued During Period, Value, Treasury Stock Reissued	$ 6,100,000				6,800,000
Litigation Settlement, Amount			$ 3,000,000
Business Combination, Indemnification Assets, Amount as of Acquisition Date			$ 500,000
Regulatory Liabilities					$ 1,800,000		$ 1,800,000
Loss Contingency, Damages Sought, Value		$ 500,000
Notes Issued		$ 1,500,000
Severance Costs							$ 1,100,000	$ 3,700,000