Shareholders' Equity - Additional Information (Detail) - USD ($)		12 Months Ended
	Nov. 07, 2016	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted		72,000	75,000	90,000	21,000
Options outstanding		680,142	635,642	590,142	548,999	617,499
Weighted average fair value of each options granted		$ 1.21	$ 1.79	$ 1.49
Estimated volatility		87.00%	80.00%	84.00%
Expected life		5 years	6 years	6 years
Risk-free interest rate		1.30%	1.63%	2.03%
Dividend yield		0.00%	0.00%	0.00%
Share-based compensation, amount recognized		$ 64,000	$ 58,000	$ 37,000
Unrecognized compensation cost		9,000
Aggregate intrinsic value of options outstanding		0	0	0
Aggregate intrinsic value of options exercisable		0	0
Repurchase of common shares		641,000	$ 0	$ 0
Shareholders threshold percentage	4.90%
Tender Offer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Repurchase of common shares		$ 641,000
Repurchase of common shares per share		$ 1.50
Tender offer expiration period		Feb. 24, 2017
2005 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Plan, Description		2005 Equity Incentive Plan was approved by SunLink's shareholders at the Annual Meeting of Shareholders on November 7, 2005. This plan permitted the grant of options to employees, non-employeedirectors and service providers of SunLink for the purchase of up to 800,000 common shares plus the number of unused shares under the 2001 Plans, which is 30,675, by November 2015.
Purchase of common shares		800,000
Options granted		0	45,000
Options outstanding		380,142
Options exercised		0
Terms of award		This Plan restricted the number of Incentive Stock Options to 700,000 shares and Restricted Stock Awards to 200,000 shares.
Share options to be granted for each restricted share award		4
2005 Equity Incentive Plan [Member] | 2001 Plans [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares restricted under share based plan		30,675
Maximum [Member] | Tender Offer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Repurchase of common shares		$ 280,800
2011 Director Stock Option Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Plan, Description		2011 Director Stock Option Plan was approved by SunLink's shareholders at the Annual Meeting of Shareholders on November 7, 2011. This plan permits the grant of options to non-employee directors of SunLink for the purchase of up to 300,000 common shares through November 2021.
Options granted		72,000	30,000
Options outstanding		300,000
Options exercised		0
2011 Director Stock Option Plan [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Purchase of common shares		300,000
Incentive Stock Options [Member] | 2005 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares, Restricted		700,000
Restricted Stock Awards [Member] | 2005 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares, Restricted		200,000