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Significant Accounting Policies (Details) - USD ($) |  | 1 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
May 01, 2018 | Apr. 01, 2019 | Jun. 30, 2021 | Mar. 31, 2021 | Jun. 30, 2020 | Mar. 31, 2020 | Jun. 30, 2021 | Jun. 30, 2020 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Feb. 28, 2021 | Jan. 31, 2021 | Jan. 31, 2019
Significant Accounting Policies (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total shareholders’ deficits |  |  |  |  |  |  |  |  | $ (384,602,000) |  |  |  |  |
Working capital total |  |  |  |  |  |  |  |  | 5,697,000 |  |  |  |  |
Cash flows operations |  |  |  |  |  |  | $ (15,025,000) | $ 260,000 | $ 15,556,000 | $ 13,371,000 | $ (5,492,000) |  |  |
Ownership percentage |  |  |  |  |  |  |  |  | 80.00% | 20.00% |  |  |  |
Net revenues |  |  |  |  |  |  |  |  |  |  | 509,000 |  |  |
Net income loss |  |  |  |  |  |  |  |  |  |  | 5,492,000 |  |  |
Variable interest entity operating activities amount |  |  |  |  |  |  |  |  |  |  | 6,796,000 |  |  |
Variable interest entity investing activities |  |  |  |  |  |  |  |  |  |  | 1,290,000 |  |  |
Notes receivable |  |  |  |  |  |  |  |  | $ 20,839,000 | $ 33,356,000 |  |  |  |
Interest income from the short-term investments |  |  |  |  |  |  |  |  | $ 37,000 | 366,000 |  |  |  |
Estimated useful life term |  |  |  |  |  |  |  |  | 50 years |  |  |  |  |
Recognized impairment loss of long lived assets |  |  |  |  |  |  |  |  | $ 567,000 | $ 2,908,000 |  |  |  |
Fair value measurement percentage |  |  |  |  |  |  |  |  |  | 20.00% |  |  |  |
Deferred revenue |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,565,000
Adjustment to retained earnings and accumulate deficit |  |  |  |  |  |  |  |  | 1,565,000 |  |  |  |  | $ 1,565,000
Revenue |  |  | $ 33,372,000 |  | $ 21,698,000 |  | 48,310,000 | 28,647,000 | 107,518,000 | $ 76,434,000 | 174,235,000 |  |  |
Revenue recognized |  |  |  |  |  |  |  |  | 582,000 | 556,000 |  |  |  |
Amortized deferred subsidy |  |  |  |  |  |  |  |  | 166,000 | 2,304,000 | 1,904,000 |  |  |
Deferred subsidy income |  |  |  |  |  |  |  |  | 215,000 | 127,000 |  |  |  |
Deferred non current portion |  |  |  |  |  |  |  |  | 1,221,000 | 1,389,000 |  |  |  |
Government subsidy income |  |  |  |  |  |  |  |  | 3,000,000 | 3,243,000 | $ 9,538,000 |  |  |
Aggregate amount |  |  |  |  |  |  |  |  | 35,194,000 | $ 32,844,000 |  |  |  |
Net revenue percentage |  |  |  |  |  |  |  |  | $ 0.10 |  |  |  |  |
Percentage of accounts receivable |  |  |  |  |  |  |  |  |  |  | 10.00% |  |  |
Purchase percentage |  |  |  |  |  |  |  |  | 12.00% | 17.00% | 26.00% |  |  |
Revenue recognized |  |  | 135,000 |  | 206,000 |  | $ 1,321,000 | $ 446,000 |  |  |  |  |  |
Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of convertible notes |  |  |  |  |  |  |  |  |  |  |  | $ 9,921,000 | $ 57,500,000 |
Revenue From Products [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Value added tax rate percentage |  | 13.00% |  |  |  |  |  |  |  |  |  |  |  |
Services [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Value added tax rate percentage |  | 6.00% |  |  |  |  |  |  |  |  |  |  |  |
Customers [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Group to pledge notes received percentage |  |  |  |  |  |  |  |  | 111.00% |  |  |  |  |
Deposit [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deposit of the face rate |  |  |  |  |  |  |  |  | 100.00% |  |  |  |  |
Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Value added tax rate percentage | 17.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Value added tax rate percentage | 16.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Asia&Pacific [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  | 29,084,000 | $ 41,568,000 | 14,802,000 | $ 18,687,000 |  |  | $ 82,655,000 | $ 65,437,000 |  |  |  |
Europe [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  | 4,231,000 | 6,558,000 | 6,890,000 | 9,930,000 |  |  | 24,314,000 | 10,679,000 |  |  |  |
Other Geographical [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | $ 549,000 | $ 318,000 |  |  |  |
Other Geographic Regions [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies (Details) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  | $ 57,000 | $ 184,000 | $ 6,000 | $ 30,000 |  |  |  |  |  |  |  |

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- Definition Amount of short-term bank loan secured by broker-dealer customer's security. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher SEC -Name Rule 15c3-1 -Number 240 -Section 15c3-1 + Details
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