XML 33 R24.htm IDEA: XBRL DOCUMENT v3.22.1
Fair Value Measurements (Tables)
6 Months Ended
Mar. 31, 2022
Fair Value Disclosures [Abstract]  
Schedule of Financial Assets Measured at Fair Value on a Recurring Basis
The Company's financial assets measured at fair value on a recurring basis subject to the disclosure requirements at March 31, 2022 and September 30, 2021, were as follows (in thousands):
  Gross Unrealized Classification on Balance Sheet
As of March 31, 2022Fair Value Level Cost or Amortized Cost Gains Losses Aggregate
Fair Value
Cash and Cash Equivalents Short-Term Investments Long-Term Investments
Changes in fair value recorded in other comprehensive income
Money Market FundsLevel 1$8,220 $— $— $8,220 $8,220 $— $— 
Certificates of depositLevel 2991 — — 991 — 991 — 
Corporate bonds and notesLevel 2147,313 (1,063)146,252 — 119,576 26,676 
Municipal bonds and notesLevel 218,779 — (143)18,636 — 16,458 2,178 
U.S. government securitiesLevel 2158,023 — (891)157,132 — 154,313 2,819 
U.S. government agency securitiesLevel 211,068 — (77)10,991 — 9,253 1,738 
Total debt investments$344,394 $$(2,174)$342,222 $8,220 $300,591 $33,411 
Changes in fair value recorded in other net income (expense)
Equity investments*$1,500 $— $— $1,500 
Total equity investments1,500 — — 1,500 
Total investments$343,722 $8,220 $300,591 $34,911 
 * The fair value of this equity investment is measured at net asset value (NAV) which approximates fair value and is not classified within the fair value hierarchy.
  Gross Unrealized Classification on Balance Sheet
As of September 30, 2021Fair Value LevelCost or Amortized Cost Gains Losses Aggregate
Fair Value
Cash and Cash Equivalents Short-Term Investments Long-Term Investments
Changes in fair value recorded in other comprehensive income
Money Market FundsLevel 1$17,150 $— $— $17,150 $17,150 $— $— 
Certificates of depositLevel 2255 — — 255 — 255 — 
Corporate bonds and notesLevel 2243,568 129 (86)243,611 4,397 186,107 53,107 
Municipal bonds and notesLevel 224,684 (9)24,677 — 13,566 11,111 
U.S. government securitiesLevel 2162,221 14 (12)162,223 — 102,615 59,608 
U.S. government agency securitiesLevel 236,053 — (14)36,039 — 27,087 8,952 
Total investments$483,931 $145 $(121)$483,955 $21,547 $329,630 $132,778 
Property, Plant and Equipment
Impairment charges were allocated to the following income statement line items for the three and six months ended March 31, 2022 and 2021 (in thousands):
 Three months ended
March 31,
Six months ended
March 31,
 2022202120222021
Cost of net product revenue$— $897 $— $2,865 
Cost of net service revenue— 3,491 — 3,492 
Sales and marketing— 10,256 6,175 11,515 
Research and development— 9,845 — 12,974 
General and administrative— 9,336 — 9,852 
Total impairment charges$— $33,825 $6,175 $40,698