XML 51 R38.htm IDEA: XBRL DOCUMENT
v3.20.2

Investments (Details) | 6 Months Ended
--- | ---
Jun. 30, 2020
Investments [Abstract] |
One year or less | 92.00%
After one year but within two years | 8.00%
Total | 100.00%

X
- References No definition available. + Details
Name: | us-gaap_InvestmentsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Debt Securities, Available For Sale, Current, Percent + References No definition available. + Details
Name: | xcur_DebtSecuritiesAvailableForSaleCurrentPercent
Namespace Prefix: | xcur_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Debt Securities, Available For Sale, Noncurrent, Percent + References No definition available. + Details
Name: | xcur_DebtSecuritiesAvailableForSaleNoncurrentPercent
Namespace Prefix: | xcur_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Debt Securities, Available for Sale, Percent + References No definition available. + Details
Name: | xcur_DebtSecuritiesAvailableforSalePercent
Namespace Prefix: | xcur_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration