Note 8 - Notes Payable - Schedule of Structured Financing Notes Payable (Details) (Parentheticals) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Amortizing securitization facility, amount secured by credit card receivables and restricted cash	$ 4,800
Securitization Financing Facility [Member]
Amortizing securitization facility, maturity date	Dec. 31, 2021	Dec. 31, 2021
Amortizing securitization facility, outstanding face amount	$ 101,300	$ 101,300
Amortizing securitization facility, amount secured by credit card receivables and restricted cash	$ 4,800	$ 5,700
Securitization Financing Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]
Amortizing securitization facility, weighted average interest rate	7.50%	7.50%