Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands		6 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Operating Activities
Net income (loss)		$ 473	$ (13,626)
Adjustments to reconcile net income (loss) to net cash (used in) provided by operating activities:
Depreciation and amortization		644	694
Write-down of inventory		230	330
Deferred income taxes			784
Non-cash share-based compensation expense		149	133
Loss on sales of subsidiaries			13,709
Provision for (reversal of) allowance for doubtful accounts, net		28	(32)
Other, net		8	4
Changes in operating assets and liabilities:
Accounts receivable		(5,485)	1,374
Inventories		859	(527)
Other assets		(1,132)	3,667
Accounts payable		3,122	(1,849)
Accrued income taxes		536	(2,094)
Accrued and other liabilities		1,232	(228)
Contract liabilities		(929)	(1,063)
Net cash (used in) provided by operating activities		(265)	1,276
Investing Activities
Purchases of property, plant and equipment		(433)	(345)
Acquisition, net of cash and cash equivalents acquired		(5,082)
Net cash disposed of in sales of subsidiaries			(9,940)
Net cash used in investing activities		(5,515)	(10,285)
Financing Activities
Proceeds from the exercise of stock options		930	779
Repurchase of common stock			(2,000)
Payments on long-term debt		(189)	(194)
Net cash provided by (used in) financing activities		741	(1,415)
Effect of Exchange Rate Changes on Cash, Cash Equivalents and Restricted Cash		368	558
Net Decrease in Cash, Cash Equivalents and Restricted Cash		(4,671)	(9,866)
Cash, Cash Equivalents and Restricted Cash, Beginning of Period	[1]	45,070	59,134
Cash, Cash Equivalents and Restricted Cash, End of Period		$ 40,399	$ 49,268

[1] Includes Cash, Cash Equivalents and Restricted Cash that are included in Held-For-Sale Assets on the Condensed Consolidated Balance Sheets for periods prior to January 22, 2020.