The explorer is running in 'regtest' mode. This saves disk space, but there is limited data.
The code for this application can be found at

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Enter a block height, e.g. 123, or the start of a bitcoin address, e.g. mzaGu

Height: 186
Hash: 3393e8739f8789cf3d271a7bc8ddf81b36f121e8a582b78a5153f5798ba94197
Previous block: 4eb7d72c389ac14861c74fdbffb58f3f0a6b7dac80b5075695a58ab733d675b3
Next block: 57ff004db079c35cb5ee914d130d7face148a8b93e910cd842b590b0ccc26bde
Weight: 912
Versionhex: 30000003
Version: 805306371
Time: 1544074764
Stripped size: 228
Size: 228
Nonce: 0
Merkle root: b69d6dbe24958280349f036be110ab06370fb73bbdb2847e27b9828e276601af
Median time: 1544074763
Difficulty: 4.656542373906925e-10
Confirmations: 16
Chainwork: 0000000000000000000000000000000000000000000000000000000000000176
Bits: 207fffff