Note 2 - Acquisitions - Fair Value of Assets Acquired and Liabilities Assumed (Details) - USD ($)		12 Months Ended
	Dec. 14, 2018	Dec. 31, 2018	Dec. 31, 2017
Cash paid as purchase consideration		$ (500,000)
Gain from purchase of Great Western Life		1,140,996
Fair value of US Alliance Corporation common stock issued as consideration	$ 3,099,165
Goodwill		$ 277,542	$ 277,542
GWLIC [Member]
Investment securities	1,380,606
Cash	872,391
Other assets	26,669
Policyholder reserves	(422,442)
Deposit type contracts	(35,659)
Other liabilities	(180,569)
Total indentifiable net assets	1,640,996
Cash paid as purchase consideration	(500,000)
Gain from purchase of Great Western Life	1,140,996
Northern Plains [Member]
Investment securities	4,623,449
Cash	1,079,627
Other assets	60,080
Policyholder reserves	(1,277,411)
Deposit type contracts	(2,029,138)
Other liabilities	(243,608)
Total indentifiable net assets	2,822,060
Value of business acquired	609,061
Goodwill	277,105
Total amounts of indentifiable assets acquired and liabilties assumed	$ 3,099,165