Lessee Operating Leases - Additional Information (Details) - USD ($) $ in Thousands	9 Months Ended
	Mar. 31, 2022	Jun. 30, 2021
Lessee Lease Description [Line Items]
Remaining right of use assets	$ 4,024	$ 5,241
Lease liabilities	4,250
Current portion of lease liabilities	1,663	1,920
Lease liabilities, net of current portion	$ 2,587	3,596
Lessee, operating lease term	88 months
Lessee, operating leases optional lease extension period	60 months
Existence of option to extend operating lease	true
Increase in average rate of lease payment	2.40%
Facilities
Lessee Lease Description [Line Items]
Remaining right of use assets	$ 3,957	5,121
Lease liabilities	4,183	5,396
Current portion of lease liabilities	1,637	1,864
Lease liabilities, net of current portion	$ 2,546	3,532
Existence of option to extend operating lease	true
Vehicles
Lessee Lease Description [Line Items]
Remaining right of use assets	$ 58	87
Lease liabilities	58	87
Current portion of lease liabilities	17	29
Lease liabilities, net of current portion	$ 41	58
Vehicles | Great Elm DME Holdings Incorporation
Lessee Lease Description [Line Items]
Lessee, operating lease term	60 months
Lessee, termination description	Each lease may be terminated by the lessee with 30-days’ notice after the first 13 months of the lease subject to certain early termination costs, including residual value guarantees.
Existence of option to terminate operating lease	true
Equipment
Lessee Lease Description [Line Items]
Remaining right of use assets	$ 9	33
Lease liabilities	9	33
Current portion of lease liabilities	9	27
Lease liabilities, net of current portion		$ 6
Minimum
Lessee Lease Description [Line Items]
Increase in average rate of lease payment, value	$ 28
Minimum | Facilities
Lessee Lease Description [Line Items]
Lessee, operating lease term	12 months
Minimum | Equipment
Lessee Lease Description [Line Items]
Lessee, operating lease term	36 months
Maximum
Lessee Lease Description [Line Items]
Increase in average rate of lease payment, value	$ 32
Maximum | Facilities
Lessee Lease Description [Line Items]
Lessee, operating lease term	96 months
Lessee, operating leases optional lease extension period	120 months
Maximum | Equipment
Lessee Lease Description [Line Items]
Lessee, operating lease term	48 months