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Segment and Revenue Information
 9 Months Ended
Jun. 30, 2022
Segment Reporting [Abstract]  
Segment and Revenue Information Segment and Revenue Information
Reportable Segments

Reported below are the Company’s segments for which separate financial information is available and upon which operating results are evaluated by the chief operating decision maker, the Chief Executive Officer, to assess performance and to allocate resources. We do not allocate sales and marketing, general and administrative expenses, or interest expense and interest income to our segments because management does not include the information in its measurement of the performance of the operating segments. Also, a measure of segment assets and liabilities has not been provided to the Company's chief operating decision maker and therefore is not shown below.

Information on reportable segments utilized by the chief operating decision maker is as follows:
(in thousands)For the Three Months Ended June 30,For the Nine Months Ended June 30,
2022202120222021
Revenue
Aerospace and Defense$13,416 $12,327 $32,322 $39,097 
Broadband10,259 30,331 66,239 75,393 
Total revenue$23,675 $42,658 $98,561 $114,490 
Segment profit
Aerospace and Defense gross profit$1,551 $3,872 $4,468 $11,747 
Aerospace and Defense research and development expense3,834 3,598 12,037 10,441 
Aerospace and Defense segment profit$(2,283)$274 $(7,569)$1,306 
Broadband gross profit$2,347 $13,353 $24,244 $32,684 
Broadband research and development expense679 902 1,638 2,126 
Broadband segment profit$1,668 $12,451 $22,606 $30,558 
Total segment profit$(615)$12,725 $15,037 $31,864 
Unallocated expense (income)
Selling, general, and administrative$7,800 $6,081 $22,550 $17,941 
Severance— — 1,318 — 
(Gain) loss on sale of assets(1,318)250 (1,919)439 
Gain on extinguishment of debt— (6,561)— (6,561)
Interest (income) expense, net(9)(579)14 (481)
Foreign exchange loss (gain)185 (87)160 (256)
Pension expense349 — 349 — 
Total unallocated expense (income)$7,007 $(896)$22,472 $11,082 
(Loss) income before income tax expense$(7,622)$13,621 $(7,435)$20,782 
Product Categories

Revenue is classified by major product category as presented below:
For the Three Months Ended June 30,
(in thousands)2022% of
Revenue		2021% of
Revenue
Aerospace and Defense
Navigation and Inertial Sensing$9,891 42 %$9,280 22 %
Defense Optoelectronics3,525 15 3,047 7 
Broadband
CATV Lasers and Transmitters7,006 29 27,364 64 
Chip Devices1,353 6 819 2 
Other Optical Products1,900 8 2,148 5 
Total revenue$23,675 100 %$42,658 100 %
For the Nine Months Ended June 30,
(in thousands)2022% of
Revenue		2021% of
Revenue
Aerospace and Defense
Navigation and Inertial Sensing$25,651 26 %$27,475 24 %
Defense Optoelectronics6,671 7 11,622 10 
Broadband
CATV Lasers and Transmitters56,449 57 65,799 58 
Chip Devices3,534 4 2,403 2 
Other Optical Products6,256 6 7,191 6 
Total revenue$98,561 100 %$114,490 100 %

Geographical Concentration

The following table sets forth revenue by geographic area based on our customers’ billing addresses:
For the Three Months Ended June 30,For the Nine Months Ended June 30,
(in thousands)2022202120222021
United States and Canada$19,043 $37,705 $86,751 $100,157 
Asia1,684 2,305 6,498 9,475 
Europe2,243 1,603 3,999 2,817 
Other705 1,045 1,313 2,041 
Total revenue$23,675 $42,658 $98,561 $114,490 

Customer Concentration

Portions of the Company’s sales are concentrated among a limited number of customers. Significant customers are defined as customers representing greater than 10% of consolidated revenue. Revenue from two significant customers represented an aggregate of 37% and 62% of our consolidated revenue for the three months ended June 30, 2022 and 2021, respectively. Revenue from two significant customers represented an aggregate of 54% of our consolidated revenue for the nine months ended June 30, 2022. Revenue from three significant customers represented an aggregate of 70% of our consolidated revenue for the nine months ended June 30, 2021. The percentage from significant customers decreased due to lower CATV revenue from our Broadband segment.

The duration, severity, and future impact of the COVID-19 pandemic is highly uncertain and could result in significant disruptions to the business operations of the Company’s customers. If one or more of these significant customers significantly decreases their orders for the Company’s products, or if we are unable to deliver finished products to the customer in connection with such orders, the Company’s business could be materially and adversely affected.