BASIS OF PRESENTATION - Condensed Consolidated Balance Sheet (Details) - USD ($) $ / shares in Units, $ in Thousands	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020
CURRENT ASSETS
Cash	$ 36,001		$ 27,767
Accounts receivable, net	13,047		9,738
Inventory	6,821		6,114
Contract asset	18		20
Prepaid and other current assets	1,895		1,459
TOTAL CURRENT ASSETS	57,782		45,098
PROPERTY, PLANT AND EQUIPMENT, net	11,155		10,843
OPERATING LEASE RIGHT OF USE ASSET	9,073		8,353
FINANCING LEASE RIGHT OF USE ASSET, net	980		907
INVENTORY, net of current portion	957		989
OTHER ASSETS	154		110
GOODWILL	7,996		6,735
INTANGIBLE ASSETS, net	2,772		2,239
DEFERRED TAX ASSET, net	403		157
TOTAL ASSETS	91,272		75,431
CURRENT LIABILITIES
Accounts payable	3,592		2,922
Accrued liabilities	5,108		3,940
Operating lease liability	2,457		2,368
Financing lease liability	189		160
Current maturities of long-term debt	480		735
Contract liability	5,062		7,028
TOTAL CURRENT LIABILITIES	16,888		17,153
CONTRACT LIABILITY, net of current portion	408		1,461
OPERATING LEASE LIABILITY, net of current portion	6,752		6,118
FINANCING LEASE LIABILITY, net of current portion	804		741
OTHER LIABILITIES	23		45
DEFERRED TAX LIABILITY, net	0
LONG-TERM DEBT, net of current portion	3,172		3,329
TOTAL LIABILITIES	28,047		28,847
COMMITMENTS AND CONTINGENCIES
STOCKHOLDERS' EQUITY
Common Stock, $0.01 par value	197		176
Treasury stock, at cost, 295,615 shares repurchased	(1,554)		(1,554)
Additional paid-in capital	51,712		34,333
Retained earnings	12,870		13,629
TOTAL STOCKHOLDERS' EQUITY	63,225	$ 62,294	46,584	$ 31,126	$ 29,578	$ 29,578
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 91,272		$ 75,431
Common stock, par value (in dollars per share)	$ 0.01		$ 0.01
Treasury stock, shares repurchased (in shares)	295,615		295,615
As Previously Reported
CURRENT ASSETS
Cash	$ 36,001
Accounts receivable, net	13,047
Inventory	6,821
Contract asset	18
Prepaid and other current assets	1,857
TOTAL CURRENT ASSETS	57,744
PROPERTY, PLANT AND EQUIPMENT, net	11,155
OPERATING LEASE RIGHT OF USE ASSET	9,073
FINANCING LEASE RIGHT OF USE ASSET, net	980
INVENTORY, net of current portion	957
OTHER ASSETS	154
GOODWILL	7,996
INTANGIBLE ASSETS, net	2,772
DEFERRED TAX ASSET, net	0
TOTAL ASSETS	90,831
CURRENT LIABILITIES
Accounts payable	3,592
Accrued liabilities	3,208
Operating lease liability	2,457
Financing lease liability	189
Current maturities of long-term debt	480
Contract liability	5,062
TOTAL CURRENT LIABILITIES	14,988
CONTRACT LIABILITY, net of current portion	408
OPERATING LEASE LIABILITY, net of current portion	6,752
FINANCING LEASE LIABILITY, net of current portion	804
OTHER LIABILITIES	23
DEFERRED TAX LIABILITY, net	53
LONG-TERM DEBT, net of current portion	3,172
TOTAL LIABILITIES	26,200
STOCKHOLDERS' EQUITY
Common Stock, $0.01 par value	197
Treasury stock, at cost, 295,615 shares repurchased	(1,554)
Additional paid-in capital	51,712
Retained earnings	14,276
TOTAL STOCKHOLDERS' EQUITY	64,631
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	90,831
Restatement Adjustment
CURRENT ASSETS
Cash	0
Accounts receivable, net	0
Inventory	0
Contract asset	0
Prepaid and other current assets	38
TOTAL CURRENT ASSETS	38
PROPERTY, PLANT AND EQUIPMENT, net	0
OPERATING LEASE RIGHT OF USE ASSET	0
FINANCING LEASE RIGHT OF USE ASSET, net	0
INVENTORY, net of current portion	0
OTHER ASSETS	0
GOODWILL	0
INTANGIBLE ASSETS, net	0
DEFERRED TAX ASSET, net	403
TOTAL ASSETS	441
CURRENT LIABILITIES
Accounts payable	0
Accrued liabilities	1,900
Operating lease liability	0
Financing lease liability	0
Current maturities of long-term debt	0
Contract liability	0
TOTAL CURRENT LIABILITIES	1,900
CONTRACT LIABILITY, net of current portion	0
OPERATING LEASE LIABILITY, net of current portion	0
FINANCING LEASE LIABILITY, net of current portion	0
OTHER LIABILITIES	0
DEFERRED TAX LIABILITY, net	(53)
LONG-TERM DEBT, net of current portion	0
TOTAL LIABILITIES	1,847
STOCKHOLDERS' EQUITY
Common Stock, $0.01 par value	0
Treasury stock, at cost, 295,615 shares repurchased	0
Additional paid-in capital	0
Retained earnings	(1,406)
TOTAL STOCKHOLDERS' EQUITY	(1,406)
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 441