CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Statement [Abstract]
Revenues	$ 5,197,000	$ 5,169,000	$ 10,518,000	$ 10,474,000
Costs of revenue:
Maintenance and supplies	652,000	627,000	1,320,000	1,253,000
Depreciation and amortization	2,008,000	1,664,000	3,902,000	3,321,000
Other direct operating costs	808,000	797,000	1,630,000	1,613,000
Costs of revenue	3,468,000	3,088,000	6,852,000	6,187,000
Gross Margin	1,729,000	2,081,000	3,666,000	4,287,000
Selling and administrative expense	1,081,000	1,032,000	2,136,000	2,017,000
Interest expense	346,000	406,000	713,000	831,000
Operating income	302,000	643,000	817,000	1,439,000
Proceeds received from investment in equity securities	0	22,000	0	22,000
Interest and other income	4,000	4,000	8,000	9,000
Income before income taxes	306,000	669,000	825,000	1,470,000
Income tax expense	27,000	169,000	151,000	319,000
Net income	279,000	500,000	674,000	1,151,000
Less: Net income attributable to non-controlling interest	(248,000)	(213,000)	(373,000)	(474,000)
Net income attributable to American Shared Hospital Services	$ 31,000	$ 287,000	$ 301,000	$ 677,000
Net income per share:
Earnings per common share - basic (in USD per share)	$ 0.01	$ 0.05	$ 0.05	$ 0.12
Earnings per common share - diluted (in USD per share)	$ 0.01	$ 0.05	$ 0.05	$ 0.12