CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Statement [Abstract]
Revenues	$ 3,991	$ 5,197	$ 8,559	$ 10,518
Costs of revenue:
Maintenance and supplies	553	652	1,186	1,320
Depreciation and amortization	1,637	2,008	3,284	3,902
Other direct operating costs	894	808	1,788	1,630
Cost and expenses	3,084	3,468	6,258	6,852
Gross margin	907	1,729	2,301	3,666
Selling and administrative expense	1,210	1,081	2,421	2,136
Interest expense	267	346	549	713
Operating (loss) income	(570)	302	(669)	817
Interest and other income	1	4	4	8
(Loss) income before income taxes	(569)	306	(665)	825
Income tax (benefit) expense	(130)	27	(158)	151
Net (loss) income	(439)	279	(507)	674
Less: Net income attributable to non-controlling interest	(44)	(248)	(111)	(373)
Net (loss) income attributable to American Shared Hospital Services	$ (483)	$ 31	$ (618)	$ 301
Net (loss) income per share:
(Loss) earnings per common share - basic (in USD per share)	$ (0.08)	$ 0.01	$ (0.10)	$ 0.05
(Loss) earnings per common share - diluted (in USD per share)	$ (0.08)	$ 0.01	$ (0.10)	$ 0.05