CONDENSED CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Sub-Total ASHS	Non-controlling Interests in Subsidiaries
Beginning balance at Dec. 31, 2017	$ 29,885	$ 10,711	$ 6,272	$ 6,873	$ 23,856	$ 6,029
Beginning balance (in shares) at Dec. 31, 2017		5,710
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	55	$ 0	55	0	55	0
Stock-based compensation expense (in shares)		0
Net income	651	$ 0	0	390	390	261
Ending balance at Mar. 31, 2018	30,591	$ 10,711	6,327	7,263	24,301	6,290
Ending balance (in shares) at Mar. 31, 2018		5,710
Beginning balance at Dec. 31, 2017	29,885	$ 10,711	6,272	6,873	23,856	6,029
Beginning balance (in shares) at Dec. 31, 2017		5,710
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,439
Ending balance at Sep. 30, 2018	31,023	$ 10,711	6,441	7,718	24,870	6,153
Ending balance (in shares) at Sep. 30, 2018		5,714
Beginning balance at Mar. 31, 2018	30,591	$ 10,711	6,327	7,263	24,301	6,290
Beginning balance (in shares) at Mar. 31, 2018		5,710
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	57	$ 0	57	0	57	0
Stock-based compensation expense (in shares)		4
Cash distributions to non-controlling interests	(77)	$ 0	0	0	0	(77)
Net income	500	0	0	287	287	213
Ending balance at Jun. 30, 2018	31,071	$ 10,711	6,384	7,550	24,645	6,426
Ending balance (in shares) at Jun. 30, 2018		5,714
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	57	$ 0	57	0	57	0
Stock-based compensation expense (in shares)		0
Cash distributions to non-controlling interests	(393)	$ 0	0	0	0	(393)
Net income	288	0	0	168	168	120
Ending balance at Sep. 30, 2018	31,023	$ 10,711	6,441	7,718	24,870	6,153
Ending balance (in shares) at Sep. 30, 2018		5,714
Beginning balance at Dec. 31, 2018	31,048	$ 10,711	6,495	7,896	25,102	5,946
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	55	$ 0	55	0	55	0
Stock-based compensation expense (in shares)		0
Cash distributions to non-controlling interests	(19)	$ 0	0	0	0	(19)
Net income	395	0	0	270	270	125
Ending balance at Mar. 31, 2019	31,479	$ 10,711	6,550	8,166	25,427	6,052
Ending balance (in shares) at Mar. 31, 2019		5,714
Beginning balance at Dec. 31, 2018	31,048	$ 10,711	6,495	7,896	25,102	5,946
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 1,028
Options exercised (in shares)	16
Ending balance at Sep. 30, 2019	$ 31,422	10,752	6,665	8,362	25,779	5,643
Beginning balance at Mar. 31, 2019	31,479	10,711	6,550	8,166	25,427	6,052
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	53	$ 0	53	0	53	0
Stock-based compensation expense (in shares)		86
Cash distributions to non-controlling interests	(57)	$ 0	0	0	0	(57)
Net income	279	0	0	31	31	248
Ending balance at Jun. 30, 2019	31,754	$ 10,711	6,603	8,197	25,511	6,243
Ending balance (in shares) at Jun. 30, 2019		5,800
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	62	$ 0	62	0	62	0
Stock-based compensation expense (in shares)		0
Cash distributions to non-controlling interests	(789)	$ 0	0	0	0	(789)
Net income	354	0	0	165	165	189
Options exercised	41	$ 41	0	0	41	0
Options exercised (in shares)		16
Ending balance at Sep. 30, 2019	$ 31,422	$ 10,752	$ 6,665	$ 8,362	$ 25,779	$ 5,643