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REVENUE RECOGNITION - Narrative (Details) | 12 Months Ended
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Dec. 31, 2021
Minimum |
Disaggregation of Revenue [Line Items] |
Interest rate | 8.00%
Repayment term | 12 months
Maximum |
Disaggregation of Revenue [Line Items] |
Interest rate | 12.00%
Repayment term | 18 months

X
- Definition Trade Receivable, Payment Term + References No definition available. + Details
Name: | grwg_TradeReceivablePaymentTerm
Namespace Prefix: | grwg_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Trade Receivable, Stated Interest Rate + References No definition available. + Details
Name: | grwg_TradeReceivableStatedInterestRate
Namespace Prefix: | grwg_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DisaggregationOfRevenueLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |