Summary of Significant Accounting Policies (Schedule of Costs, Estimated Earnings and Billings) (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Jun. 30, 2019
Receivables [Abstract]
Costs incurred on uncompleted contracts	$ 17,019	$ 19,285
Estimated earnings	1,580	1,224
Less: billings to date	(16,637)	(19,673)
Retainage	923	797
Ending balance	$ 2,885	$ 1,633

The amount of assets, typically cash, provided to suppliers of goods in advance of receipt and acceptance, or services (such as research facilities, lawyers or consultants), which is held by such parties until the entity either effects full payment (including applying the retainer) or obtains release from liability.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.8,17)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Name:	us-gaap_RetainageDeposit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant