Note 7 - Income Taxes (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	27.50%	34.00%
Income Tax Expense (Benefit), Total	$ 326	$ (490)
Tax Adjustments, Settlements, and Unusual Provisions	202
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability	202
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	(278)	(1,321)
Liability for Uncertainty in Income Taxes, Current	0	0
Income Tax Examination, Penalties and Interest Accrued, Total	0	0
Deferred Tax Assets Related to Net Operating Loss [Member]
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	(185)	$ (823)
Expired in 2020 [Member]
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration	77
Domestic Tax Authority [Member]
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration	35,000
State and Local Jurisdiction [Member]
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration	$ 10,200
State and Local Jurisdiction [Member] | New Jersey Division of Taxation [Member] | Earliest Tax Year [Member]
Income Tax Examination, Year under Examination	2014
State and Local Jurisdiction [Member] | New Jersey Division of Taxation [Member] | Latest Tax Year [Member]
Income Tax Examination, Year under Examination	2017