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Fair Value Measurements (Tables)
 9 Months Ended
Jun. 30, 2019
Fair Value Disclosures [Abstract]  
Fair Value Measurements for Assets and Liabilities Measured at Fair Value on Recurring Basis

The following table summarizes fair value measurements at June 30, 2019 and September 30, 2018 for assets and liabilities measured at fair value on a recurring basis:

June 30, 2019:

 

 

 

Level 1

 

 

Level 2

 

 

Level 3

 

 

Total

 

Cash and cash equivalents

 

$

188,330,973

 

 

$

—

 

 

$

—

 

 

$

188,330,973

 

Restricted cash

 

$

1,000,774

 

 

$

—

 

 

$

—

 

 

$

1,000,774

 

Short-term investments

 

$

48,637,864

 

 

$

—

 

 

$

—

 

 

$

48,637,864

 

Long-term investments

 

$

58,546,109

 

 

$

—

 

 

$

—

 

 

$

58,546,109

 

Contingent consideration

 

$

—

 

 

$

—

 

 

$

—

 

 

$

—

 

 

September 30, 2018:

 

 

 

Level 1

 

 

Level 2

 

 

Level 3

 

 

Total

 

Cash and cash equivalents

 

$

30,133,213

 

 

$

—

 

 

$

—

 

 

$

30,133,213

 

Restricted cash

 

$

—

 

 

$

—

 

 

$

—

 

 

$

—

 

Short-term investments

 

$

45,971,126

 

 

$

—

 

 

$

—

 

 

$

45,971,126

 

Long-term investments

 

$

—

 

 

$

—

 

 

$

—

 

 

$

—

 

Contingent consideration

 

$

—

 

 

$

—

 

 

$

—

 

 

$

—