Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Current
Cash and cash equivalents	$ 3,224	$ 3,115
Accounts receivable	608	533
Inventory	423	464
Prepaid expenses	226	235
Total current assets	4,481	4,347
Loan fees, net	7	9
Right-of-use asset - operating leases	84
Oil and gas properties, net (full cost accounting method)	4,650	4,804
Other property and equipment, net	169	190
Accounts receivable - noncurrent	130	130
Other noncurrent assets	4	4
Total assets	9,525	9,484
Current liabilities
Accounts payable - trade	173	132
Accrued liabilities	267	282
Lease liabilities - operating leases - current	59
Lease liabilities - finance leases - current	77
Current maturities of long-term debt		51
Asset retirement obligation - current	83	83
Total current liabilities	659	548
Lease liabilities - operating leases - noncurrent	25
Lease liabilities - finance leases - noncurrent	35
Long term debt, less current maturities		73
Asset retirement obligation - non current	2,131	2,096
Total liabilities	2,850	2,717
Commitments and contingencies (Note 13)
Preferred stock, 25,000,000 shares authorized:
Series A Preferred stock, $0.0001 par value, 10,000 shares designated; 0 shares issued and outstanding
Common stock, $.001 par value, authorized 100,000,000 shares, 10,644,252 and 10,639,290 shares issued and outstanding	11	11
Additional paid-in capital	58,280	58,276
Accumulated deficit	(51,616)	(51,520)
Total stockholders' equity	6,675	6,767
Total liabilities and stockholders' equity	$ 9,525	$ 9,484