Significant Changes Due To Topic 606 (Summary of the Effects of Adoption of ASC Topic 606 on the Company's unaudited Consolidated Statements of Operations) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenue, net	$ 116,462	$ 90,637	$ 68,980
Cost of goods sold	79,299	63,890	52,264
Gross profit	37,163	26,747	16,716
Operating expenses:
Sales and marketing	12,369	9,447	4,700
General and administrative	13,009	10,339	9,154
Research and development	4,671	4,458	4,688
Restructuring charges (Note 3)			132
Total operating expenses	30,049	24,244	18,674
Operating income (loss)	7,114	2,503	(1,958)
Interest expense	(314)	(716)	(553)
Other expense	(769)	(367)	(602)
Income (loss) from continuing operations before income taxes and discontinued operations	6,031	1,420	(3,113)
Income tax expense	484	8	217
Income (loss) from continuing operations before discontinued operations	5,547	1,412	(3,330)
Loss on sale of discontinued operations (Note 2)		(164)
Loss from discontinued operations (Note 2)		(128)	(1,770)
Net income (loss)	5,547	1,120	(5,100)
Less: Loss allocated to non-controlling interest		(938)	(157)
Net income (loss) attributable to IntriCon shareholders	$ 5,547	$ 2,058	$ (4,943)
Basic income (loss) per share attributable to IntriCon shareholders:
Continuing operations	$ 0.73	$ 0.34	$ (0.49)
Discontinued operations		(0.04)	(0.27)
Net income (loss) per share:	0.73	0.30	(0.76)
Diluted income (loss) per share attributable to IntriCon shareholders:
Continuing operations	0.64	0.32	(0.49)
Discontinued operations		(0.04)	(0.27)
Net income (loss) per share:	$ 0.64	$ 0.28	$ (0.76)
Average shares outstanding:
Basic	7,599	6,852	6,497
Diluted	8,630	7,307	6,497
Accounting Standards Update 2014-09 [Member]
Revenue, net		$ 90,637	$ 68,980
Cost of goods sold		63,890	52,264
Gross profit		26,747	16,716
Operating expenses:
Sales and marketing		9,447	4,700
General and administrative		10,339	9,154
Research and development		4,458	4,688
Restructuring charges (Note 3)			132
Total operating expenses		24,244	18,674
Operating income (loss)		2,503	(1,958)
Interest expense		(716)	(553)
Other expense		(367)	(602)
Income (loss) from continuing operations before income taxes and discontinued operations		1,420	(3,113)
Income tax expense		8	217
Income (loss) from continuing operations before discontinued operations		1,412	(3,330)
Loss on sale of discontinued operations (Note 2)		(164)
Loss from discontinued operations (Note 2)		(128)	(1,770)
Net income (loss)		1,120	(5,100)
Less: Loss allocated to non-controlling interest		(938)	(157)
Net income (loss) attributable to IntriCon shareholders		$ 2,058	$ (4,943)
Basic income (loss) per share attributable to IntriCon shareholders:
Continuing operations		$ 0.34	$ (0.49)
Discontinued operations		(0.04)	(0.27)
Net income (loss) per share:		0.30	(0.76)
Diluted income (loss) per share attributable to IntriCon shareholders:
Continuing operations		0.32	(0.49)
Discontinued operations		(0.04)	(0.27)
Net income (loss) per share:		$ 0.28	$ (0.76)
Average shares outstanding:
Basic		6,852	6,497
Diluted		7,307	6,497
Accounting Standards Update 2014-09 [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
Revenue, net		$ 2,327	$ 971
Cost of goods sold		2,071	1,327
Gross profit		256	(356)
Operating expenses:
Operating income (loss)		256	(356)
Income (loss) from continuing operations before income taxes and discontinued operations		256	(356)
Income (loss) from continuing operations before discontinued operations		256	(356)
Net income (loss)		256	(356)
Net income (loss) attributable to IntriCon shareholders		$ 256	$ (356)
Basic income (loss) per share attributable to IntriCon shareholders:
Continuing operations		$ 0.04	$ (0.05)
Net income (loss) per share:		0.04	(0.05)
Diluted income (loss) per share attributable to IntriCon shareholders:
Continuing operations		0.04	(0.05)
Net income (loss) per share:		$ 0.04	$ (0.05)
Average shares outstanding:
Basic		6,852	6,497
Diluted		7,307	6,497
Accounting Standards Update 2014-09 [Member] | Calculated under Revenue Guidance in Effect before Topic 606 [Member]
Revenue, net		$ 88,310	$ 68,009
Cost of goods sold		61,819	50,937
Gross profit		26,491	17,072
Operating expenses:
Sales and marketing		9,447	4,700
General and administrative		10,339	9,154
Research and development		4,458	4,688
Restructuring charges (Note 3)			132
Total operating expenses		24,244	18,674
Operating income (loss)		2,247	(1,602)
Interest expense		(716)	(553)
Other expense		(367)	(602)
Income (loss) from continuing operations before income taxes and discontinued operations		1,164	(2,757)
Income tax expense		8	217
Income (loss) from continuing operations before discontinued operations		1,156	(2,974)
Loss on sale of discontinued operations (Note 2)		(164)
Loss from discontinued operations (Note 2)		(128)	(1,770)
Net income (loss)		864	(4,744)
Less: Loss allocated to non-controlling interest		(938)	(157)
Net income (loss) attributable to IntriCon shareholders		$ 1,802	$ (4,587)
Basic income (loss) per share attributable to IntriCon shareholders:
Continuing operations		$ 0.31	$ (0.43)
Discontinued operations		(0.04)	(0.27)
Net income (loss) per share:		0.26	(0.71)
Diluted income (loss) per share attributable to IntriCon shareholders:
Continuing operations		0.29	(0.43)
Discontinued operations		(0.04)	(0.27)
Net income (loss) per share:		$ 0.25	$ (0.71)
Average shares outstanding:
Basic		6,852	6,497
Diluted		7,307	6,497