CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Statement [Abstract]
Revenues	$ 5,301	$ 4,470	$ 15,819	$ 14,944
Costs of revenue:
Maintenance and supplies	648	470	1,968	1,723
Depreciation and amortization	1,817	1,761	5,719	5,082
Other direct operating costs	1,023	605	2,653	2,218
Costs of revenue	3,488	2,836	10,340	9,023
Gross Margin	1,813	1,634	5,479	5,921
Selling and administrative expense	1,065	1,050	3,201	3,067
Interest expense	302	399	1,015	1,230
Operating income	446	185	1,263	1,624
Proceeds received from investment in equity securities	0	0	0	22
Interest and other income	7	185	15	194
Income before income taxes	453	370	1,278	1,840
Income tax expense	99	82	250	401
Net income	354	288	1,028	1,439
Less: Net income attributable to non-controlling interest	(189)	(120)	(562)	(594)
Net income attributable to American Shared Hospital Services	$ 165	$ 168	$ 466	$ 845
Net income per share:
Earnings per common share - basic (in USD per share)	$ 0.03	$ 0.03	$ 0.08	$ 0.14
Earnings per common share - diluted (in USD per share)	$ 0.03	$ 0.03	$ 0.08	$ 0.14