XML 50 R35.htm IDEA: XBRL DOCUMENT
v3.21.1

Accounts receivable, net (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2020
Accounts receivable, net. |
Schedule of Accounts receivable | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31,
​ |  | 2020 |  | 2019
Trade accounts receivable | ​ | $ | 21,422,782 | ​ | $ | 22,862,706
Receivable from OC-BVI | ​ |  | 62,171 | ​ |  | 10,808
Other accounts receivable | ​ |  | 269,133 | ​ |  | 222,381
​ | ​ |  | 21,754,086 | ​ |  | 23,095,895
Allowance for doubtful accounts | ​ |  | (270,110) | ​ |  | (142,236)
Accounts receivable, net | ​ | $ | 21,483,976 | ​ | $ | 22,953,659
​
Schedule of Allowance for doubtful accounts | The activity for the allowance for doubtful accounts consisted of: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31,
​ |  | 2020 |  | 2019
Opening allowance for doubtful accounts | ​ | $ | 142,236 | ​ | $ | 158,902
Provision for doubtful accounts | ​ |  | 129,107 | ​ |  | —
Accounts written off during the year | ​ |  | (1,233) | ​ |  | (16,666)
Ending allowance for doubtful accounts | ​ | $ | 270,110 | ​ | $ | 142,236
​

X
- Definition Tabular disclosure of allowance for credit loss on financing receivable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447 + Details
Name: | us-gaap_AllowanceForCreditLossesOnFinancingReceivablesTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Tabular disclosure of the various types of trade accounts and notes receivable and for each the gross carrying value, allowance, and net carrying value as of the balance sheet date. Presentation is categorized by current, noncurrent and unclassified receivables. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3,4) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration