Note 4 - Income (Loss) Per Share - Earnings Per Share Reconciliation (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020
Net income (loss)	$ 368	$ (1,128)	$ 672	$ 654	$ (2,274)	$ (1,979)	$ (88)	$ (3,599)
Less: Income allocated to non-controlling interest	31			10			40	17
Net income (loss) attributable to Intricon shareholders	$ 337			$ 644			$ (128)	$ (3,616)
Basic – weighted shares outstanding (in shares)	9,104			8,936			9,059	8,877
Weighted shares assumed upon exercise of stock awards (in shares)	520			336			0	0
Diluted – weighted shares outstanding (in shares)	9,624			9,272			9,059	8,877
Basic income (loss) per share attributable to Intricon shareholders: (in dollars per share)	$ 0.04			$ 0.07			$ (0.01)	$ (0.41)
Diluted income (loss) per share attributable to Intricon shareholders: (in dollars per share)	$ 0.04			$ 0.07			$ (0.01)	$ (0.41)