Prepaid expenses and other current assets (Tables)
|6 Months Ended|
Jun. 30, 2018
|Prepaid expenses and other current assets [Abstract]|
|Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block]||
As of June 30, 2018 and December 31, 2017, prepaid expenses and other current assets consisted of the following:
Tabular disclosure of the amounts paid in advance for capitalized costs that will be expensed with the passage of time or the occurrence of a triggering event, and will be charged against earnings within one year or the normal operating cycle, if longer; the aggregate carrying amount of current assets, not separately presented elsewhere in the balance sheet; and other deferred costs.
Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef