Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements - Changes in fair value (Details)

v3.20.1
Fair Value Measurements - Changes in fair value (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2019
USD ($)
Balance $ 10,905
Conversion of convertible notes (9,914)
Issuance of warrant (991)
Fair value of investment 11,148
Balance 11,175
Warrants [Member]  
Balance 991
Issuance of warrant 27
Caelum Convertible Notes [Member]  
Balance 9,914
Caelum Convertible Notes [Member] | Caelum [Member]  
Balance 0
Conversion of convertible notes 0
Issuance of warrant 0
Fair value of investment 11,148
Balance 11,148
Caelum Convertible Notes [Member] | Warrants [Member] | Caelum [Member]  
Issuance of warrant 0
Warrants [Member]  
Balance 991
Conversion of convertible notes 0
Issuance of warrant (991)
Fair value of investment 0
Balance 27
Warrants [Member] | Warrants [Member]  
Issuance of warrant 27
Caelum Convertible Notes [Member]  
Balance 9,914
Conversion of convertible notes (9,914)
Issuance of warrant 0
Fair value of investment 0
Balance 0
Caelum Convertible Notes [Member] | Warrants [Member]  
Issuance of warrant $ 0