Note 6 - Accounts Payable and Accrued Liabilities - Components Accounts Payable and Accrued Liabilities in Consolidated Balance Sheets (Details) - USD ($) $ in Thousands		Dec. 31, 2018	Dec. 31, 2017
Accounts payable - trade		$ 1,944	$ 666
Accrued legal-related fees		206	274
Accrued employee compensation		1,648	700
Accrued interest			434
Accrued production fees		255	447
Accrued utilities payable		344	677
Accrued taxes payable		101	172
Customer deposit			436
Other accrued liabilities *	[1]	376	205
Total accounts payable and accrued liabilities		$ 4,874	$ 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.