Note 8 - Accounts Payable and Accrued Liabilities - Components Accounts Payable and Accrued Liabilities in Consolidated Balance Sheets (Details) - USD ($) $ in Thousands		Jun. 30, 2018	Dec. 31, 2017
Accounts payable - trade		$ 1,053	$ 666
Accrued legal-related fees		82	274
Accrued employee compensation		655	700
Accrued interest		418	434
Accrued production fees		315	447
Accrued utilities and supplies payable		605	677
Accrued taxes payable		52	172
Customer deposit			436
Other accrued liabilities *	[1]	340	205
Total accounts payable and accrued liabilities		$ 3,520	$ 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.