Credit Facilities (Details)		1 Months Ended	2 Months Ended	12 Months Ended
	Oct. 29, 2015 USD ($)	Mar. 31, 2015 USD ($)	Sep. 09, 2016 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2016 EUR (€)	Jun. 30, 2016 USD ($)	Dec. 31, 2015 EUR (€)	Dec. 31, 2015 USD ($)	Oct. 30, 2015 USD ($)	Jun. 30, 2015 USD ($)
Line of Credit Facility [Line Items]
Short-term notes payable						$ 200,000				$ 0
Other long-term debt outstanding						365,000
Comerica Bank Credit Agreement, 7th Amendment [Member]
Line of Credit Facility [Line Items]
Commitment fee percentage	0.15%
Maximum borrowing capacity	$ 6,000,000
Minimum tangible net worth	31,000,000
Comerica Bank Credit Agreement, 8th Amendment [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity									$ 10,000,000
Borrowing capacity as a percentage of eligible inventory									50.00%
Maximum inventory related borrowing capacity									$ 4,000,000
Maximum accounts receivable related borrowing capacity	$ 6,000,000
Borrowing capacity as a percentage of eligible accounts receivable	80.00%
Current borrowing capacity						4,000,000
Minimum tangible net worth				$ 29,000,000
Maximum dividends				$ 0
Maximum number of days advances may be outstanding during calendar year				30 days
Credit facility, amount outstanding						0
Comerica Bank Credit Agreement, 8th Amendment [Member] | Subsequent Event [Member]
Line of Credit Facility [Line Items]
Amount borrowed from credit facility			$ 1,500,000
Comerica Bank Credit Agreement, 8th Amendment [Member] | LIBOR Rate [Member]
Line of Credit Facility [Line Items]
Spread on variable interest rate				2.35%
Perceptron GmbH [Member] | Unsecured Credit Facility [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity					€ 350,000	388,000
Credit facility, amount outstanding						$ 0				0
Perceptron GmbH [Member] | Unsecured Credit Facility For Working Capital Needs [Member]
Line of Credit Facility [Line Items]
Borrowing capacity for working capital needs | €					€ 100,000
Interest rate on borrowings					4.25%	4.25%
Perceptron GmbH [Member] | Unsecured Credit Facility For Working Capital Needs [Member] | Amount In Excess Of Limit [Member]
Line of Credit Facility [Line Items]
Interest rate on borrowings					7.15%	7.15%
Perceptron GmbH [Member] | Unsecured Credit Facility For Providing Bank Guarantees [Member]
Line of Credit Facility [Line Items]
Borrowing capacity for providing bank guarantees | €					€ 250,000
Interest rate on borrowings					2.00%	2.00%
Coord3 [Member] | Manufacturing Facility Loan [Member]
Line of Credit Facility [Line Items]
Interest rate on borrowings					7.00%	7.00%
Principal payable					€ 510,000	$ 565,000
Loan term				36 months
Coord3 [Member] | Secured Credit Facility [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity							€ 200,000	$ 222,000
Coord3 [Member]
Line of Credit Facility [Line Items]
Bank debt acquired										2,109,000
Loans payable										$ 2,109,000
Payment of short-term debt		$ 1,700,000