Note 7 - Accounts Payable and Accrued Liabilities - Components Accounts Payable and Accrued Liabilities in Consolidated Balance Sheets (Details) - USD ($) $ in Thousands		Mar. 31, 2018	Dec. 31, 2017
Accounts payable - trade		$ 772	$ 666
Accrued legal-related fees		192	274
Accrued employee compensation		470	700
Accrued interest		416	434
Accrued production fees		353	447
Accrued utilities and supplies payable		833	677
Accrued taxes payable		358	172
Customer deposit			436
Other accrued liabilities *	[1]	73	205
Total accounts payable and accrued liabilities		$ 3,467	$ 4,011

[1] Other accrued liabilities consist of franchise taxes, audit fees, and a variety of other expenses, none of which individually represent greater than five percent of total current liabilities.