Note 8 - Lease - Total Lease Expense (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($)
Operating lease cost	$ 37
Short-term lease expense	594	[1]
Total lease expense	$ 631
Weighted Average Remaining Lease Term (in years) (Year)	9 years 116 days
Weighted Average Discount Rate	6.00%
Cash paid for amounts included in the measurement of lease liabilities
ROU assets added in exchange for lease obligations (since adoption)
Drilling Rig [Member]
Short-term lease expense	$ 973	[2]

[1] Short-term lease expense represents expense related to leases with a contract term of 12 months or less.

[2] These short-term lease costs are related to leases with a contract term of 12 months or less which are related to drilling rigs and are capitalized as part of natural gas and oil properties on our balance sheet.