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Note 4 - Acquisition and Divestiture (Details Textual) - USD ($)
3 Months Ended
Jul. 27, 2017
Feb. 01, 2017
Dec. 31, 2018
Mar. 31, 2017
Jan. 06, 2016
Discontinued Operations, Disposed of by Sale [Member] | Corvisa LLC [Member]          
Disposal Groups, Including Discontinued Operations, Ownership Percentage         100.00%
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax, Total       $ 1,000,000  
Healthcare Staffing, Inc. [Member]          
Sale of Stock, Consideration Received on Transaction   $ 24,000,000      
Sale of Stock, Consideration Received on Transaction, Working Capital Adjustment   $ 5,000,000      
Divestiture of Business, Consideration Held in Escrow to Secure Indemnification Obligations $ 240,000        
Business Combination, Contingent Consideration, Liability, Total 100,000        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Gross Receivables 7,500,000        
Business Combination, Investment Advisory Fees 900,000        
Healthcare Staffing, Inc. [Member] | General and Administrative Expense [Member]          
Business Acquisition, Transaction Costs $ 1,300,000        
Healthcare Staffing, Inc. [Member] | Customer Relationships [Member]          
Finite-Lived Intangible Asset, Useful Life 7 years        
Healthcare Staffing, Inc. [Member] | Noncompete Agreements [Member]          
Finite-Lived Intangible Asset, Useful Life 3 years        
Healthcare Staffing, Inc. [Member] | HCS Purchase Agreement, Reps and Warranties Insurance [Member]          
Proceeds from Insurance Settlement, Investing Activities     $ 500,000